/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-e5469eb [2021-01-20 11:32:32,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-20 11:32:32,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-20 11:32:32,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-20 11:32:32,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-20 11:32:32,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-20 11:32:32,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-20 11:32:32,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-20 11:32:32,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-20 11:32:32,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-20 11:32:32,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-20 11:32:32,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-20 11:32:32,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-20 11:32:32,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-20 11:32:32,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-20 11:32:32,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-20 11:32:32,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-20 11:32:32,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-20 11:32:32,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-20 11:32:32,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-20 11:32:32,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-20 11:32:32,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-20 11:32:32,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-20 11:32:32,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-20 11:32:32,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-20 11:32:32,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-20 11:32:32,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-20 11:32:32,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-20 11:32:32,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-20 11:32:32,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-20 11:32:32,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-20 11:32:32,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-20 11:32:32,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-20 11:32:32,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-20 11:32:32,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-20 11:32:32,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-20 11:32:32,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-20 11:32:32,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-20 11:32:32,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-20 11:32:32,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-20 11:32:32,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-20 11:32:32,479 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-01-20 11:32:32,529 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-20 11:32:32,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-20 11:32:32,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-20 11:32:32,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-20 11:32:32,534 INFO L138 SettingsManager]: * Use SBE=true [2021-01-20 11:32:32,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-20 11:32:32,535 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-20 11:32:32,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-20 11:32:32,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-20 11:32:32,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-20 11:32:32,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-20 11:32:32,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-20 11:32:32,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-20 11:32:32,537 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-20 11:32:32,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-20 11:32:32,538 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-20 11:32:32,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-20 11:32:32,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-20 11:32:32,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-20 11:32:32,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-20 11:32:32,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-20 11:32:32,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 11:32:32,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-20 11:32:32,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-20 11:32:32,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-20 11:32:32,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-20 11:32:32,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-20 11:32:32,541 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-20 11:32:32,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-20 11:32:32,541 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-20 11:32:32,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-20 11:32:32,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-20 11:32:33,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-20 11:32:33,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-20 11:32:33,011 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-20 11:32:33,012 INFO L275 PluginConnector]: CDTParser initialized [2021-01-20 11:32:33,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2021-01-20 11:32:33,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0440c5a3/1f5f0e46d25d4773ab151714268c55b1/FLAG4ff62e77a [2021-01-20 11:32:34,007 INFO L306 CDTParser]: Found 1 translation units. [2021-01-20 11:32:34,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2021-01-20 11:32:34,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0440c5a3/1f5f0e46d25d4773ab151714268c55b1/FLAG4ff62e77a [2021-01-20 11:32:34,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0440c5a3/1f5f0e46d25d4773ab151714268c55b1 [2021-01-20 11:32:34,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-20 11:32:34,118 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-20 11:32:34,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-20 11:32:34,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-20 11:32:34,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-20 11:32:34,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:32:34" (1/1) ... [2021-01-20 11:32:34,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@667cf232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:34, skipping insertion in model container [2021-01-20 11:32:34,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:32:34" (1/1) ... [2021-01-20 11:32:34,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-20 11:32:34,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-20 11:32:34,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 11:32:34,733 INFO L203 MainTranslator]: Completed pre-run [2021-01-20 11:32:34,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 11:32:34,860 INFO L208 MainTranslator]: Completed translation [2021-01-20 11:32:34,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:34 WrapperNode [2021-01-20 11:32:34,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-20 11:32:34,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-20 11:32:34,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-20 11:32:34,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-20 11:32:34,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:34" (1/1) ... [2021-01-20 11:32:34,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:34" (1/1) ... [2021-01-20 11:32:34,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-20 11:32:34,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-20 11:32:34,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-20 11:32:34,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-20 11:32:34,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:34" (1/1) ... [2021-01-20 11:32:34,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:34" (1/1) ... [2021-01-20 11:32:34,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:34" (1/1) ... [2021-01-20 11:32:34,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:34" (1/1) ... [2021-01-20 11:32:34,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:34" (1/1) ... [2021-01-20 11:32:34,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:34" (1/1) ... [2021-01-20 11:32:34,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:34" (1/1) ... [2021-01-20 11:32:34,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-20 11:32:34,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-20 11:32:34,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-20 11:32:34,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-20 11:32:34,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 11:32:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-20 11:32:35,102 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-20 11:32:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-20 11:32:35,103 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-20 11:32:35,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-20 11:32:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-20 11:32:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-20 11:32:35,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-20 11:32:35,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-20 11:32:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-20 11:32:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-20 11:32:35,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-20 11:32:35,108 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-20 11:32:35,615 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-20 11:32:35,615 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-20 11:32:35,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:32:35 BoogieIcfgContainer [2021-01-20 11:32:35,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-20 11:32:35,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-20 11:32:35,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-20 11:32:35,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-20 11:32:35,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:32:34" (1/3) ... [2021-01-20 11:32:35,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147bd21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:32:35, skipping insertion in model container [2021-01-20 11:32:35,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:34" (2/3) ... [2021-01-20 11:32:35,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147bd21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:32:35, skipping insertion in model container [2021-01-20 11:32:35,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:32:35" (3/3) ... [2021-01-20 11:32:35,627 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2021-01-20 11:32:35,646 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-20 11:32:35,646 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-20 11:32:35,650 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-20 11:32:35,651 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-20 11:32:35,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,687 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,687 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,687 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,688 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,688 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,689 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,690 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,690 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,690 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,690 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,691 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,691 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,691 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,691 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,692 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,692 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,692 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,692 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,693 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,693 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,694 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,694 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,694 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,695 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,695 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,695 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,695 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,696 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,696 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,696 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,696 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,697 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,697 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,698 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,698 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,698 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,698 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,699 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,699 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,701 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,702 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,702 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,702 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,703 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,703 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,709 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,709 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,710 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,710 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,710 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,710 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:35,714 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-20 11:32:35,728 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-20 11:32:35,755 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-20 11:32:35,756 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-20 11:32:35,756 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-20 11:32:35,756 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-20 11:32:35,756 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-20 11:32:35,756 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-20 11:32:35,757 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-20 11:32:35,757 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-20 11:32:35,769 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2021-01-20 11:32:35,912 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:35,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-20 11:32:35,939 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:35,940 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:35,941 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:35,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2143390317, now seen corresponding path program 1 times [2021-01-20 11:32:35,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:35,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461680258] [2021-01-20 11:32:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:36,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461680258] [2021-01-20 11:32:36,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:36,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 11:32:36,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155802206] [2021-01-20 11:32:36,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 11:32:36,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:36,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 11:32:36,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 11:32:36,499 INFO L87 Difference]: Start difference. First operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:36,778 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2021-01-20 11:32:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 11:32:36,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-01-20 11:32:36,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:36,810 INFO L225 Difference]: With dead ends: 4034 [2021-01-20 11:32:36,810 INFO L226 Difference]: Without dead ends: 1472 [2021-01-20 11:32:36,812 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 11:32:36,813 INFO L78 Accepts]: Start accepts. Automaton has 1472 states. Word has length 28 [2021-01-20 11:32:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:36,814 INFO L481 AbstractCegarLoop]: Abstraction has 1472 states. [2021-01-20 11:32:36,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states. [2021-01-20 11:32:36,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 11:32:36,823 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:36,823 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:36,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-20 11:32:36,824 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:36,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:36,825 INFO L82 PathProgramCache]: Analyzing trace with hash 409143693, now seen corresponding path program 1 times [2021-01-20 11:32:36,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:36,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636534679] [2021-01-20 11:32:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:37,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636534679] [2021-01-20 11:32:37,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:37,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:32:37,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833940811] [2021-01-20 11:32:37,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:32:37,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:37,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:32:37,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:32:37,048 INFO L87 Difference]: Start difference. First operand 1472 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:37,248 INFO L93 Difference]: Finished difference Result 1856 states and 4981 transitions. [2021-01-20 11:32:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:32:37,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-20 11:32:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:37,263 INFO L225 Difference]: With dead ends: 1856 [2021-01-20 11:32:37,267 INFO L226 Difference]: Without dead ends: 1552 [2021-01-20 11:32:37,268 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:32:37,268 INFO L78 Accepts]: Start accepts. Automaton has 1552 states. Word has length 33 [2021-01-20 11:32:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:37,270 INFO L481 AbstractCegarLoop]: Abstraction has 1552 states. [2021-01-20 11:32:37,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states. [2021-01-20 11:32:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 11:32:37,273 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:37,274 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:37,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-20 11:32:37,274 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:37,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:37,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1822434001, now seen corresponding path program 2 times [2021-01-20 11:32:37,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:37,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581320006] [2021-01-20 11:32:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:37,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581320006] [2021-01-20 11:32:37,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:37,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:32:37,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446294294] [2021-01-20 11:32:37,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:32:37,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:37,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:32:37,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:32:37,472 INFO L87 Difference]: Start difference. First operand 1552 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:37,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:37,692 INFO L93 Difference]: Finished difference Result 2064 states and 5525 transitions. [2021-01-20 11:32:37,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-20 11:32:37,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-20 11:32:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:37,707 INFO L225 Difference]: With dead ends: 2064 [2021-01-20 11:32:37,708 INFO L226 Difference]: Without dead ends: 1742 [2021-01-20 11:32:37,708 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-20 11:32:37,709 INFO L78 Accepts]: Start accepts. Automaton has 1742 states. Word has length 33 [2021-01-20 11:32:37,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:37,709 INFO L481 AbstractCegarLoop]: Abstraction has 1742 states. [2021-01-20 11:32:37,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:37,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states. [2021-01-20 11:32:37,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 11:32:37,712 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:37,712 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:37,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-20 11:32:37,713 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:37,714 INFO L82 PathProgramCache]: Analyzing trace with hash 26886563, now seen corresponding path program 1 times [2021-01-20 11:32:37,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:37,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955470601] [2021-01-20 11:32:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:37,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955470601] [2021-01-20 11:32:37,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:37,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:32:37,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560572796] [2021-01-20 11:32:37,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:32:37,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:37,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:32:37,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:32:37,990 INFO L87 Difference]: Start difference. First operand 1742 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:38,204 INFO L93 Difference]: Finished difference Result 2254 states and 6000 transitions. [2021-01-20 11:32:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:32:38,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-20 11:32:38,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:38,221 INFO L225 Difference]: With dead ends: 2254 [2021-01-20 11:32:38,221 INFO L226 Difference]: Without dead ends: 1996 [2021-01-20 11:32:38,222 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:32:38,222 INFO L78 Accepts]: Start accepts. Automaton has 1996 states. Word has length 33 [2021-01-20 11:32:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:38,223 INFO L481 AbstractCegarLoop]: Abstraction has 1996 states. [2021-01-20 11:32:38,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states. [2021-01-20 11:32:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:38,229 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:38,229 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:38,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-20 11:32:38,230 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:38,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:38,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1836185505, now seen corresponding path program 1 times [2021-01-20 11:32:38,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:38,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385532671] [2021-01-20 11:32:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:38,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385532671] [2021-01-20 11:32:38,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:38,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 11:32:38,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923305322] [2021-01-20 11:32:38,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 11:32:38,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:38,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 11:32:38,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-20 11:32:38,503 INFO L87 Difference]: Start difference. First operand 1996 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:38,655 INFO L93 Difference]: Finished difference Result 2188 states and 5771 transitions. [2021-01-20 11:32:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 11:32:38,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 11:32:38,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:38,671 INFO L225 Difference]: With dead ends: 2188 [2021-01-20 11:32:38,671 INFO L226 Difference]: Without dead ends: 2036 [2021-01-20 11:32:38,672 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-01-20 11:32:38,672 INFO L78 Accepts]: Start accepts. Automaton has 2036 states. Word has length 38 [2021-01-20 11:32:38,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:38,673 INFO L481 AbstractCegarLoop]: Abstraction has 2036 states. [2021-01-20 11:32:38,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:38,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states. [2021-01-20 11:32:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:38,676 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:38,677 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:38,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-20 11:32:38,677 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:38,678 INFO L82 PathProgramCache]: Analyzing trace with hash 703073151, now seen corresponding path program 2 times [2021-01-20 11:32:38,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:38,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686658883] [2021-01-20 11:32:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:38,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686658883] [2021-01-20 11:32:38,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:38,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 11:32:38,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173619961] [2021-01-20 11:32:38,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 11:32:38,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:38,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 11:32:38,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-20 11:32:38,848 INFO L87 Difference]: Start difference. First operand 2036 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:39,119 INFO L93 Difference]: Finished difference Result 2884 states and 7547 transitions. [2021-01-20 11:32:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 11:32:39,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 11:32:39,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:39,136 INFO L225 Difference]: With dead ends: 2884 [2021-01-20 11:32:39,137 INFO L226 Difference]: Without dead ends: 2456 [2021-01-20 11:32:39,137 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:39,137 INFO L78 Accepts]: Start accepts. Automaton has 2456 states. Word has length 38 [2021-01-20 11:32:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:39,138 INFO L481 AbstractCegarLoop]: Abstraction has 2456 states. [2021-01-20 11:32:39,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states. [2021-01-20 11:32:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:39,142 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:39,142 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:39,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-20 11:32:39,143 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:39,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:39,143 INFO L82 PathProgramCache]: Analyzing trace with hash -127797699, now seen corresponding path program 3 times [2021-01-20 11:32:39,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:39,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200310949] [2021-01-20 11:32:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:39,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200310949] [2021-01-20 11:32:39,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:39,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 11:32:39,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024446333] [2021-01-20 11:32:39,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 11:32:39,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:39,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 11:32:39,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-20 11:32:39,342 INFO L87 Difference]: Start difference. First operand 2456 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:39,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:39,615 INFO L93 Difference]: Finished difference Result 3192 states and 8257 transitions. [2021-01-20 11:32:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 11:32:39,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 11:32:39,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:39,634 INFO L225 Difference]: With dead ends: 3192 [2021-01-20 11:32:39,635 INFO L226 Difference]: Without dead ends: 2886 [2021-01-20 11:32:39,635 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-01-20 11:32:39,635 INFO L78 Accepts]: Start accepts. Automaton has 2886 states. Word has length 38 [2021-01-20 11:32:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:39,636 INFO L481 AbstractCegarLoop]: Abstraction has 2886 states. [2021-01-20 11:32:39,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states. [2021-01-20 11:32:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:39,642 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:39,642 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:39,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-20 11:32:39,643 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:39,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1809094268, now seen corresponding path program 1 times [2021-01-20 11:32:39,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:39,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121485690] [2021-01-20 11:32:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:39,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121485690] [2021-01-20 11:32:39,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133824797] [2021-01-20 11:32:39,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:39,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:39,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:40,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:40,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:40,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:40,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69845297] [2021-01-20 11:32:40,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:40,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:40,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:40,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:40,145 INFO L87 Difference]: Start difference. First operand 2886 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:40,364 INFO L93 Difference]: Finished difference Result 3350 states and 8492 transitions. [2021-01-20 11:32:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-20 11:32:40,365 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:40,385 INFO L225 Difference]: With dead ends: 3350 [2021-01-20 11:32:40,385 INFO L226 Difference]: Without dead ends: 3046 [2021-01-20 11:32:40,385 INFO L769 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 [2021-01-20 11:32:40,386 INFO L78 Accepts]: Start accepts. Automaton has 3046 states. Word has length 43 [2021-01-20 11:32:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:40,386 INFO L481 AbstractCegarLoop]: Abstraction has 3046 states. [2021-01-20 11:32:40,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states. [2021-01-20 11:32:40,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:40,392 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:40,392 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:40,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-20 11:32:40,608 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:40,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:40,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1432941800, now seen corresponding path program 2 times [2021-01-20 11:32:40,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:40,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662661997] [2021-01-20 11:32:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:40,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662661997] [2021-01-20 11:32:40,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43032849] [2021-01-20 11:32:40,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:40,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:40,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:40,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:40,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:40,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:40,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:40,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:40,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313468969] [2021-01-20 11:32:40,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:40,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:40,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:40,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:40,962 INFO L87 Difference]: Start difference. First operand 3046 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:41,200 INFO L93 Difference]: Finished difference Result 3238 states and 8204 transitions. [2021-01-20 11:32:41,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-20 11:32:41,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:41,211 INFO L225 Difference]: With dead ends: 3238 [2021-01-20 11:32:41,211 INFO L226 Difference]: Without dead ends: 3086 [2021-01-20 11:32:41,212 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:32:41,212 INFO L78 Accepts]: Start accepts. Automaton has 3086 states. Word has length 43 [2021-01-20 11:32:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:41,213 INFO L481 AbstractCegarLoop]: Abstraction has 3086 states. [2021-01-20 11:32:41,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states. [2021-01-20 11:32:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:41,220 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:41,220 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:41,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:41,434 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:41,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1083428478, now seen corresponding path program 3 times [2021-01-20 11:32:41,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:41,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510044734] [2021-01-20 11:32:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:41,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510044734] [2021-01-20 11:32:41,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098737077] [2021-01-20 11:32:41,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:41,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 11:32:41,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:41,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:41,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:41,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:41,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:41,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:41,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188119200] [2021-01-20 11:32:41,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:41,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:41,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:41,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:41,793 INFO L87 Difference]: Start difference. First operand 3086 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:42,041 INFO L93 Difference]: Finished difference Result 3550 states and 8892 transitions. [2021-01-20 11:32:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-20 11:32:42,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:42,052 INFO L225 Difference]: With dead ends: 3550 [2021-01-20 11:32:42,052 INFO L226 Difference]: Without dead ends: 3246 [2021-01-20 11:32:42,053 INFO L769 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 [2021-01-20 11:32:42,053 INFO L78 Accepts]: Start accepts. Automaton has 3246 states. Word has length 43 [2021-01-20 11:32:42,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:42,054 INFO L481 AbstractCegarLoop]: Abstraction has 3246 states. [2021-01-20 11:32:42,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:42,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states. [2021-01-20 11:32:42,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:42,060 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:42,060 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:42,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-20 11:32:42,276 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash 615590430, now seen corresponding path program 4 times [2021-01-20 11:32:42,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:42,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689337225] [2021-01-20 11:32:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:42,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689337225] [2021-01-20 11:32:42,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418945210] [2021-01-20 11:32:42,403 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 [2021-01-20 11:32:42,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:32:42,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:42,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:42,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:42,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:42,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:42,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:42,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-20 11:32:42,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947183991] [2021-01-20 11:32:42,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 11:32:42,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:42,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 11:32:42,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-01-20 11:32:42,722 INFO L87 Difference]: Start difference. First operand 3246 states. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:43,330 INFO L93 Difference]: Finished difference Result 4926 states and 12284 transitions. [2021-01-20 11:32:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:32:43,331 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:43,342 INFO L225 Difference]: With dead ends: 4926 [2021-01-20 11:32:43,343 INFO L226 Difference]: Without dead ends: 4216 [2021-01-20 11:32:43,343 INFO L769 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 [2021-01-20 11:32:43,344 INFO L78 Accepts]: Start accepts. Automaton has 4216 states. Word has length 43 [2021-01-20 11:32:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:43,344 INFO L481 AbstractCegarLoop]: Abstraction has 4216 states. [2021-01-20 11:32:43,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4216 states. [2021-01-20 11:32:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:43,351 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:43,351 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:43,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:43,566 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:43,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1442221188, now seen corresponding path program 5 times [2021-01-20 11:32:43,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:43,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976498287] [2021-01-20 11:32:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:43,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976498287] [2021-01-20 11:32:43,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460609524] [2021-01-20 11:32:43,691 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 [2021-01-20 11:32:43,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:43,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:43,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:43,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:43,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:43,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:43,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:43,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831833821] [2021-01-20 11:32:43,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:43,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:43,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:43,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:43,880 INFO L87 Difference]: Start difference. First operand 4216 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:44,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:44,253 INFO L93 Difference]: Finished difference Result 4702 states and 11464 transitions. [2021-01-20 11:32:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-20 11:32:44,254 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:44,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:44,267 INFO L225 Difference]: With dead ends: 4702 [2021-01-20 11:32:44,267 INFO L226 Difference]: Without dead ends: 4550 [2021-01-20 11:32:44,268 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-01-20 11:32:44,268 INFO L78 Accepts]: Start accepts. Automaton has 4550 states. Word has length 43 [2021-01-20 11:32:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:44,269 INFO L481 AbstractCegarLoop]: Abstraction has 4550 states. [2021-01-20 11:32:44,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 4550 states. [2021-01-20 11:32:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:44,276 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:44,276 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:44,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-20 11:32:44,492 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:44,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:44,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1439455800, now seen corresponding path program 6 times [2021-01-20 11:32:44,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:44,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392157918] [2021-01-20 11:32:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:44,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392157918] [2021-01-20 11:32:44,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606653204] [2021-01-20 11:32:44,635 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 [2021-01-20 11:32:44,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 11:32:44,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:44,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:44,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:44,805 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:44,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:44,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:44,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-20 11:32:44,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664762357] [2021-01-20 11:32:44,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 11:32:44,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:44,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 11:32:44,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-01-20 11:32:44,874 INFO L87 Difference]: Start difference. First operand 4550 states. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:46,019 INFO L93 Difference]: Finished difference Result 6876 states and 16771 transitions. [2021-01-20 11:32:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:32:46,019 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:46,037 INFO L225 Difference]: With dead ends: 6876 [2021-01-20 11:32:46,037 INFO L226 Difference]: Without dead ends: 6030 [2021-01-20 11:32:46,039 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:32:46,039 INFO L78 Accepts]: Start accepts. Automaton has 6030 states. Word has length 43 [2021-01-20 11:32:46,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:46,039 INFO L481 AbstractCegarLoop]: Abstraction has 6030 states. [2021-01-20 11:32:46,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 6030 states. [2021-01-20 11:32:46,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:46,052 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:46,052 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:46,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:46,268 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:46,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:46,269 INFO L82 PathProgramCache]: Analyzing trace with hash -397305581, now seen corresponding path program 7 times [2021-01-20 11:32:46,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:46,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908620478] [2021-01-20 11:32:46,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:46,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908620478] [2021-01-20 11:32:46,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380952687] [2021-01-20 11:32:46,482 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 [2021-01-20 11:32:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:46,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:46,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:46,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:46,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:46,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246905511] [2021-01-20 11:32:46,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:46,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:46,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:46,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:46,733 INFO L87 Difference]: Start difference. First operand 6030 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:47,223 INFO L93 Difference]: Finished difference Result 6822 states and 16260 transitions. [2021-01-20 11:32:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 11:32:47,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:47,238 INFO L225 Difference]: With dead ends: 6822 [2021-01-20 11:32:47,239 INFO L226 Difference]: Without dead ends: 6430 [2021-01-20 11:32:47,239 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-01-20 11:32:47,240 INFO L78 Accepts]: Start accepts. Automaton has 6430 states. Word has length 48 [2021-01-20 11:32:47,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:47,240 INFO L481 AbstractCegarLoop]: Abstraction has 6430 states. [2021-01-20 11:32:47,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 6430 states. [2021-01-20 11:32:47,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:47,251 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:47,252 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:47,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-20 11:32:47,467 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:47,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2054932487, now seen corresponding path program 1 times [2021-01-20 11:32:47,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:47,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538054863] [2021-01-20 11:32:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:47,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538054863] [2021-01-20 11:32:47,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489832367] [2021-01-20 11:32:47,628 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 [2021-01-20 11:32:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:47,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:47,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:47,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:47,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:47,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:47,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165662886] [2021-01-20 11:32:47,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:47,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:47,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:47,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:47,875 INFO L87 Difference]: Start difference. First operand 6430 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:48,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:48,308 INFO L93 Difference]: Finished difference Result 6742 states and 15972 transitions. [2021-01-20 11:32:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 11:32:48,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:48,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:48,325 INFO L225 Difference]: With dead ends: 6742 [2021-01-20 11:32:48,326 INFO L226 Difference]: Without dead ends: 6590 [2021-01-20 11:32:48,332 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-01-20 11:32:48,332 INFO L78 Accepts]: Start accepts. Automaton has 6590 states. Word has length 48 [2021-01-20 11:32:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:48,332 INFO L481 AbstractCegarLoop]: Abstraction has 6590 states. [2021-01-20 11:32:48,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 6590 states. [2021-01-20 11:32:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:48,343 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:48,343 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:48,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-20 11:32:48,556 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:48,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:48,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1656816609, now seen corresponding path program 2 times [2021-01-20 11:32:48,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:48,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076382388] [2021-01-20 11:32:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:48,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076382388] [2021-01-20 11:32:48,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911808265] [2021-01-20 11:32:48,732 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 [2021-01-20 11:32:48,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:48,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:48,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:48,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:49,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:49,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:49,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:49,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289595456] [2021-01-20 11:32:49,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:49,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:49,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:49,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:49,034 INFO L87 Difference]: Start difference. First operand 6590 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:49,486 INFO L93 Difference]: Finished difference Result 6862 states and 16212 transitions. [2021-01-20 11:32:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 11:32:49,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:49,501 INFO L225 Difference]: With dead ends: 6862 [2021-01-20 11:32:49,502 INFO L226 Difference]: Without dead ends: 6710 [2021-01-20 11:32:49,502 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-01-20 11:32:49,502 INFO L78 Accepts]: Start accepts. Automaton has 6710 states. Word has length 48 [2021-01-20 11:32:49,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:49,503 INFO L481 AbstractCegarLoop]: Abstraction has 6710 states. [2021-01-20 11:32:49,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:49,503 INFO L276 IsEmpty]: Start isEmpty. Operand 6710 states. [2021-01-20 11:32:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:49,513 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:49,513 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:49,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-20 11:32:49,728 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:49,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:49,729 INFO L82 PathProgramCache]: Analyzing trace with hash 203636825, now seen corresponding path program 8 times [2021-01-20 11:32:49,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:49,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619064963] [2021-01-20 11:32:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:49,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619064963] [2021-01-20 11:32:49,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245277296] [2021-01-20 11:32:49,856 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 [2021-01-20 11:32:49,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:49,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:49,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:50,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:50,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:50,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:50,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260743255] [2021-01-20 11:32:50,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:50,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:50,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:50,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:50,118 INFO L87 Difference]: Start difference. First operand 6710 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:50,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:50,588 INFO L93 Difference]: Finished difference Result 7502 states and 17620 transitions. [2021-01-20 11:32:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 11:32:50,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:50,602 INFO L225 Difference]: With dead ends: 7502 [2021-01-20 11:32:50,602 INFO L226 Difference]: Without dead ends: 7110 [2021-01-20 11:32:50,604 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-01-20 11:32:50,604 INFO L78 Accepts]: Start accepts. Automaton has 7110 states. Word has length 48 [2021-01-20 11:32:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:50,604 INFO L481 AbstractCegarLoop]: Abstraction has 7110 states. [2021-01-20 11:32:50,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 7110 states. [2021-01-20 11:32:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:50,615 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:50,615 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:50,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-20 11:32:50,830 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:50,831 INFO L82 PathProgramCache]: Analyzing trace with hash -243091131, now seen corresponding path program 9 times [2021-01-20 11:32:50,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:50,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078828190] [2021-01-20 11:32:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:50,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078828190] [2021-01-20 11:32:50,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880791846] [2021-01-20 11:32:50,998 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 [2021-01-20 11:32:51,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:32:51,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:51,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:51,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:51,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:51,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97238233] [2021-01-20 11:32:51,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:51,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:51,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:51,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:51,251 INFO L87 Difference]: Start difference. First operand 7110 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:51,998 INFO L93 Difference]: Finished difference Result 8180 states and 19135 transitions. [2021-01-20 11:32:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:32:51,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:51,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:52,009 INFO L225 Difference]: With dead ends: 8180 [2021-01-20 11:32:52,010 INFO L226 Difference]: Without dead ends: 7700 [2021-01-20 11:32:52,010 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 11:32:52,011 INFO L78 Accepts]: Start accepts. Automaton has 7700 states. Word has length 48 [2021-01-20 11:32:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:52,011 INFO L481 AbstractCegarLoop]: Abstraction has 7700 states. [2021-01-20 11:32:52,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 7700 states. [2021-01-20 11:32:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:52,022 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:52,022 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:52,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-20 11:32:52,238 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:52,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:52,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1170199177, now seen corresponding path program 10 times [2021-01-20 11:32:52,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:52,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630333592] [2021-01-20 11:32:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:52,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630333592] [2021-01-20 11:32:52,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651361412] [2021-01-20 11:32:52,415 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 [2021-01-20 11:32:52,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:32:52,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:52,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:52,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:52,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:52,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:52,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:52,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:52,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972892668] [2021-01-20 11:32:52,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:52,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:52,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:52,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:52,651 INFO L87 Difference]: Start difference. First operand 7700 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:53,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:53,608 INFO L93 Difference]: Finished difference Result 10010 states and 23466 transitions. [2021-01-20 11:32:53,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 11:32:53,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:53,619 INFO L225 Difference]: With dead ends: 10010 [2021-01-20 11:32:53,620 INFO L226 Difference]: Without dead ends: 9370 [2021-01-20 11:32:53,620 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:32:53,620 INFO L78 Accepts]: Start accepts. Automaton has 9370 states. Word has length 48 [2021-01-20 11:32:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:53,621 INFO L481 AbstractCegarLoop]: Abstraction has 9370 states. [2021-01-20 11:32:53,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 9370 states. [2021-01-20 11:32:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:53,632 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:53,632 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:53,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:53,844 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:53,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1533122351, now seen corresponding path program 3 times [2021-01-20 11:32:53,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:53,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98359697] [2021-01-20 11:32:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:53,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98359697] [2021-01-20 11:32:53,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172970627] [2021-01-20 11:32:53,969 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 [2021-01-20 11:32:54,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:32:54,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:54,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:54,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:54,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:54,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:54,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:54,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210807169] [2021-01-20 11:32:54,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:54,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:54,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:54,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:54,267 INFO L87 Difference]: Start difference. First operand 9370 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:54,981 INFO L93 Difference]: Finished difference Result 10182 states and 23612 transitions. [2021-01-20 11:32:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:32:54,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:54,993 INFO L225 Difference]: With dead ends: 10182 [2021-01-20 11:32:54,993 INFO L226 Difference]: Without dead ends: 10030 [2021-01-20 11:32:54,994 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 11:32:54,994 INFO L78 Accepts]: Start accepts. Automaton has 10030 states. Word has length 48 [2021-01-20 11:32:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:54,994 INFO L481 AbstractCegarLoop]: Abstraction has 10030 states. [2021-01-20 11:32:54,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 10030 states. [2021-01-20 11:32:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:55,006 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:55,007 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:55,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-20 11:32:55,221 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:55,222 INFO L82 PathProgramCache]: Analyzing trace with hash -119832043, now seen corresponding path program 4 times [2021-01-20 11:32:55,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:55,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288750946] [2021-01-20 11:32:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:55,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288750946] [2021-01-20 11:32:55,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000411684] [2021-01-20 11:32:55,375 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 [2021-01-20 11:32:55,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:32:55,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:55,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:55,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:55,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:55,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:55,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:55,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:55,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705419462] [2021-01-20 11:32:55,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:55,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:55,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:55,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:55,639 INFO L87 Difference]: Start difference. First operand 10030 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:56,892 INFO L93 Difference]: Finished difference Result 12886 states and 29960 transitions. [2021-01-20 11:32:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 11:32:56,892 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:56,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:56,910 INFO L225 Difference]: With dead ends: 12886 [2021-01-20 11:32:56,910 INFO L226 Difference]: Without dead ends: 12298 [2021-01-20 11:32:56,911 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=561, Invalid=1989, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 11:32:56,911 INFO L78 Accepts]: Start accepts. Automaton has 12298 states. Word has length 48 [2021-01-20 11:32:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:56,912 INFO L481 AbstractCegarLoop]: Abstraction has 12298 states. [2021-01-20 11:32:56,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 12298 states. [2021-01-20 11:32:56,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:56,926 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:56,926 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:57,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:57,132 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1755085526, now seen corresponding path program 5 times [2021-01-20 11:32:57,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:57,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258865983] [2021-01-20 11:32:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:57,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258865983] [2021-01-20 11:32:57,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558426873] [2021-01-20 11:32:57,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:57,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:32:57,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:57,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:57,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:57,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:57,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:57,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:57,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:57,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:32:57,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864848728] [2021-01-20 11:32:57,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:32:57,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:57,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:32:57,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:32:57,761 INFO L87 Difference]: Start difference. First operand 12298 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:58,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:58,193 INFO L93 Difference]: Finished difference Result 12610 states and 29038 transitions. [2021-01-20 11:32:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 11:32:58,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:58,211 INFO L225 Difference]: With dead ends: 12610 [2021-01-20 11:32:58,211 INFO L226 Difference]: Without dead ends: 12458 [2021-01-20 11:32:58,212 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-01-20 11:32:58,212 INFO L78 Accepts]: Start accepts. Automaton has 12458 states. Word has length 53 [2021-01-20 11:32:58,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:58,212 INFO L481 AbstractCegarLoop]: Abstraction has 12458 states. [2021-01-20 11:32:58,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:58,212 INFO L276 IsEmpty]: Start isEmpty. Operand 12458 states. [2021-01-20 11:32:58,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:58,226 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:58,226 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:58,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-20 11:32:58,440 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:58,441 INFO L82 PathProgramCache]: Analyzing trace with hash 144817900, now seen corresponding path program 6 times [2021-01-20 11:32:58,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:58,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713518598] [2021-01-20 11:32:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:58,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713518598] [2021-01-20 11:32:58,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131586324] [2021-01-20 11:32:58,609 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 [2021-01-20 11:32:58,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:32:58,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:58,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:58,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:58,868 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:58,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:58,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:32:58,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118591220] [2021-01-20 11:32:58,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:32:58,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:58,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:32:58,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:32:58,911 INFO L87 Difference]: Start difference. First operand 12458 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:59,524 INFO L93 Difference]: Finished difference Result 12970 states and 29886 transitions. [2021-01-20 11:32:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 11:32:59,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:59,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:59,539 INFO L225 Difference]: With dead ends: 12970 [2021-01-20 11:32:59,539 INFO L226 Difference]: Without dead ends: 12578 [2021-01-20 11:32:59,540 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 11:32:59,540 INFO L78 Accepts]: Start accepts. Automaton has 12578 states. Word has length 53 [2021-01-20 11:32:59,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:59,540 INFO L481 AbstractCegarLoop]: Abstraction has 12578 states. [2021-01-20 11:32:59,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 12578 states. [2021-01-20 11:32:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:59,553 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:59,553 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:59,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:59,763 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:59,764 INFO L82 PathProgramCache]: Analyzing trace with hash -253297978, now seen corresponding path program 7 times [2021-01-20 11:32:59,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:59,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147047695] [2021-01-20 11:32:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:59,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147047695] [2021-01-20 11:32:59,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421212746] [2021-01-20 11:32:59,930 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 [2021-01-20 11:32:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:59,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:59,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:00,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:00,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:00,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:00,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237451825] [2021-01-20 11:33:00,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:00,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:00,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:00,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:00,215 INFO L87 Difference]: Start difference. First operand 12578 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:00,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:00,809 INFO L93 Difference]: Finished difference Result 12890 states and 29598 transitions. [2021-01-20 11:33:00,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-20 11:33:00,810 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:00,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:00,830 INFO L225 Difference]: With dead ends: 12890 [2021-01-20 11:33:00,831 INFO L226 Difference]: Without dead ends: 12738 [2021-01-20 11:33:00,831 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-01-20 11:33:00,831 INFO L78 Accepts]: Start accepts. Automaton has 12738 states. Word has length 53 [2021-01-20 11:33:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:00,832 INFO L481 AbstractCegarLoop]: Abstraction has 12738 states. [2021-01-20 11:33:00,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand 12738 states. [2021-01-20 11:33:00,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:00,847 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:00,848 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:01,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-20 11:33:01,062 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:01,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1610795128, now seen corresponding path program 8 times [2021-01-20 11:33:01,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:01,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519084237] [2021-01-20 11:33:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:01,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519084237] [2021-01-20 11:33:01,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335671255] [2021-01-20 11:33:01,229 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 [2021-01-20 11:33:01,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:01,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:01,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:01,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:01,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:01,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:01,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:01,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025714085] [2021-01-20 11:33:01,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:01,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:01,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:01,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:01,535 INFO L87 Difference]: Start difference. First operand 12738 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:02,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:02,073 INFO L93 Difference]: Finished difference Result 12970 states and 29758 transitions. [2021-01-20 11:33:02,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:33:02,074 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:02,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:02,089 INFO L225 Difference]: With dead ends: 12970 [2021-01-20 11:33:02,089 INFO L226 Difference]: Without dead ends: 12818 [2021-01-20 11:33:02,089 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=736, Unknown=0, NotChecked=0, Total=992 [2021-01-20 11:33:02,089 INFO L78 Accepts]: Start accepts. Automaton has 12818 states. Word has length 53 [2021-01-20 11:33:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:02,090 INFO L481 AbstractCegarLoop]: Abstraction has 12818 states. [2021-01-20 11:33:02,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 12818 states. [2021-01-20 11:33:02,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:02,102 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:02,102 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:02,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-20 11:33:02,303 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:02,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1985432118, now seen corresponding path program 9 times [2021-01-20 11:33:02,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:02,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091679127] [2021-01-20 11:33:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:02,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091679127] [2021-01-20 11:33:02,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750765493] [2021-01-20 11:33:02,462 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 [2021-01-20 11:33:02,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:33:02,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:02,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:02,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:02,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:02,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:02,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:02,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553365146] [2021-01-20 11:33:02,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:02,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:02,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:02,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:02,753 INFO L87 Difference]: Start difference. First operand 12818 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:03,516 INFO L93 Difference]: Finished difference Result 13090 states and 29998 transitions. [2021-01-20 11:33:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 11:33:03,517 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:03,533 INFO L225 Difference]: With dead ends: 13090 [2021-01-20 11:33:03,533 INFO L226 Difference]: Without dead ends: 12938 [2021-01-20 11:33:03,533 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 11:33:03,533 INFO L78 Accepts]: Start accepts. Automaton has 12938 states. Word has length 53 [2021-01-20 11:33:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:03,534 INFO L481 AbstractCegarLoop]: Abstraction has 12938 states. [2021-01-20 11:33:03,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 12938 states. [2021-01-20 11:33:03,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:03,544 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:03,544 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:03,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-20 11:33:03,758 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:03,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:03,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1474228438, now seen corresponding path program 10 times [2021-01-20 11:33:03,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:03,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86227360] [2021-01-20 11:33:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:03,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86227360] [2021-01-20 11:33:03,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784798809] [2021-01-20 11:33:03,935 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 [2021-01-20 11:33:04,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:04,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:04,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:04,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:04,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:04,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:04,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:04,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:04,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:04,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119583842] [2021-01-20 11:33:04,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:04,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:04,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:04,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:04,278 INFO L87 Difference]: Start difference. First operand 12938 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:04,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:04,853 INFO L93 Difference]: Finished difference Result 13130 states and 30078 transitions. [2021-01-20 11:33:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:33:04,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:04,868 INFO L225 Difference]: With dead ends: 13130 [2021-01-20 11:33:04,868 INFO L226 Difference]: Without dead ends: 12978 [2021-01-20 11:33:04,868 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2021-01-20 11:33:04,868 INFO L78 Accepts]: Start accepts. Automaton has 12978 states. Word has length 53 [2021-01-20 11:33:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:04,869 INFO L481 AbstractCegarLoop]: Abstraction has 12978 states. [2021-01-20 11:33:04,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 12978 states. [2021-01-20 11:33:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:04,880 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:04,880 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:05,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-20 11:33:05,094 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:05,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1882091344, now seen corresponding path program 11 times [2021-01-20 11:33:05,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:05,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366606394] [2021-01-20 11:33:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:05,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366606394] [2021-01-20 11:33:05,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609751814] [2021-01-20 11:33:05,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:05,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:33:05,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:05,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:05,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:05,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:05,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:05,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:05,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:05,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:05,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151107094] [2021-01-20 11:33:05,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:05,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:05,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:05,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:05,594 INFO L87 Difference]: Start difference. First operand 12978 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:06,126 INFO L93 Difference]: Finished difference Result 13290 states and 30398 transitions. [2021-01-20 11:33:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:33:06,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:06,146 INFO L225 Difference]: With dead ends: 13290 [2021-01-20 11:33:06,147 INFO L226 Difference]: Without dead ends: 13138 [2021-01-20 11:33:06,147 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-01-20 11:33:06,147 INFO L78 Accepts]: Start accepts. Automaton has 13138 states. Word has length 53 [2021-01-20 11:33:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:06,148 INFO L481 AbstractCegarLoop]: Abstraction has 13138 states. [2021-01-20 11:33:06,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 13138 states. [2021-01-20 11:33:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:06,289 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:06,289 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:06,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-20 11:33:06,503 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:06,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:06,504 INFO L82 PathProgramCache]: Analyzing trace with hash 271823718, now seen corresponding path program 12 times [2021-01-20 11:33:06,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:06,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026062845] [2021-01-20 11:33:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:06,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026062845] [2021-01-20 11:33:06,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515299195] [2021-01-20 11:33:06,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:06,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:33:06,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:06,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:06,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:06,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:06,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:06,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:06,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618015133] [2021-01-20 11:33:06,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:06,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:06,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:06,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:06,956 INFO L87 Difference]: Start difference. First operand 13138 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:07,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:07,675 INFO L93 Difference]: Finished difference Result 13650 states and 31246 transitions. [2021-01-20 11:33:07,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:33:07,676 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:07,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:07,692 INFO L225 Difference]: With dead ends: 13650 [2021-01-20 11:33:07,692 INFO L226 Difference]: Without dead ends: 13258 [2021-01-20 11:33:07,693 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 11:33:07,693 INFO L78 Accepts]: Start accepts. Automaton has 13258 states. Word has length 53 [2021-01-20 11:33:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:07,694 INFO L481 AbstractCegarLoop]: Abstraction has 13258 states. [2021-01-20 11:33:07,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 13258 states. [2021-01-20 11:33:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:07,707 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:07,707 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:07,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:07,908 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:07,909 INFO L82 PathProgramCache]: Analyzing trace with hash -126292160, now seen corresponding path program 13 times [2021-01-20 11:33:07,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:07,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635093481] [2021-01-20 11:33:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:08,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635093481] [2021-01-20 11:33:08,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490529577] [2021-01-20 11:33:08,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:08,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:08,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:08,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:08,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:08,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:08,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328217525] [2021-01-20 11:33:08,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:08,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:08,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:08,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:08,415 INFO L87 Difference]: Start difference. First operand 13258 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:09,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:09,005 INFO L93 Difference]: Finished difference Result 13570 states and 30958 transitions. [2021-01-20 11:33:09,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 11:33:09,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:09,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:09,021 INFO L225 Difference]: With dead ends: 13570 [2021-01-20 11:33:09,022 INFO L226 Difference]: Without dead ends: 13418 [2021-01-20 11:33:09,022 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-01-20 11:33:09,022 INFO L78 Accepts]: Start accepts. Automaton has 13418 states. Word has length 53 [2021-01-20 11:33:09,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:09,023 INFO L481 AbstractCegarLoop]: Abstraction has 13418 states. [2021-01-20 11:33:09,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 13418 states. [2021-01-20 11:33:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:09,034 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:09,034 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:09,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:09,236 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:09,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:09,237 INFO L82 PathProgramCache]: Analyzing trace with hash 416206614, now seen corresponding path program 14 times [2021-01-20 11:33:09,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:09,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3211299] [2021-01-20 11:33:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:09,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3211299] [2021-01-20 11:33:09,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621304574] [2021-01-20 11:33:09,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:09,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:09,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:09,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:09,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:09,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:09,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:09,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:09,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:09,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:09,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032629590] [2021-01-20 11:33:09,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:09,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:09,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:09,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:09,821 INFO L87 Difference]: Start difference. First operand 13418 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:10,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:10,334 INFO L93 Difference]: Finished difference Result 14210 states and 32238 transitions. [2021-01-20 11:33:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 11:33:10,335 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:10,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:10,351 INFO L225 Difference]: With dead ends: 14210 [2021-01-20 11:33:10,352 INFO L226 Difference]: Without dead ends: 14058 [2021-01-20 11:33:10,352 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2021-01-20 11:33:10,352 INFO L78 Accepts]: Start accepts. Automaton has 14058 states. Word has length 53 [2021-01-20 11:33:10,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:10,353 INFO L481 AbstractCegarLoop]: Abstraction has 14058 states. [2021-01-20 11:33:10,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:10,353 INFO L276 IsEmpty]: Start isEmpty. Operand 14058 states. [2021-01-20 11:33:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:10,364 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:10,364 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:10,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:10,572 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:10,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:10,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1296111798, now seen corresponding path program 15 times [2021-01-20 11:33:10,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:10,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371602307] [2021-01-20 11:33:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:10,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371602307] [2021-01-20 11:33:10,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434174528] [2021-01-20 11:33:10,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:10,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:33:10,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:10,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:10,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:11,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:11,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:11,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:11,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:11,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976299621] [2021-01-20 11:33:11,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:11,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:11,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:11,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:11,199 INFO L87 Difference]: Start difference. First operand 14058 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:12,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:12,498 INFO L93 Difference]: Finished difference Result 16334 states and 37188 transitions. [2021-01-20 11:33:12,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 11:33:12,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:12,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:12,522 INFO L225 Difference]: With dead ends: 16334 [2021-01-20 11:33:12,523 INFO L226 Difference]: Without dead ends: 15794 [2021-01-20 11:33:12,524 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:33:12,524 INFO L78 Accepts]: Start accepts. Automaton has 15794 states. Word has length 53 [2021-01-20 11:33:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:12,524 INFO L481 AbstractCegarLoop]: Abstraction has 15794 states. [2021-01-20 11:33:12,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 15794 states. [2021-01-20 11:33:12,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:12,536 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:12,536 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:12,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-20 11:33:12,737 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1088090960, now seen corresponding path program 16 times [2021-01-20 11:33:12,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:12,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088675501] [2021-01-20 11:33:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:12,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088675501] [2021-01-20 11:33:12,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975546352] [2021-01-20 11:33:12,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:12,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:12,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:12,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:33:12,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:13,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:13,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:13,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:13,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121936467] [2021-01-20 11:33:13,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:13,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:13,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:13,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:13,283 INFO L87 Difference]: Start difference. First operand 15794 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:14,212 INFO L93 Difference]: Finished difference Result 17016 states and 38453 transitions. [2021-01-20 11:33:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 11:33:14,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:14,234 INFO L225 Difference]: With dead ends: 17016 [2021-01-20 11:33:14,235 INFO L226 Difference]: Without dead ends: 16624 [2021-01-20 11:33:14,235 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=1343, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 11:33:14,236 INFO L78 Accepts]: Start accepts. Automaton has 16624 states. Word has length 53 [2021-01-20 11:33:14,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:14,236 INFO L481 AbstractCegarLoop]: Abstraction has 16624 states. [2021-01-20 11:33:14,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 16624 states. [2021-01-20 11:33:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:14,248 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:14,248 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:14,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:14,449 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:14,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:14,450 INFO L82 PathProgramCache]: Analyzing trace with hash 325199348, now seen corresponding path program 17 times [2021-01-20 11:33:14,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:14,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120322477] [2021-01-20 11:33:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:14,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120322477] [2021-01-20 11:33:14,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729324874] [2021-01-20 11:33:14,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:14,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:33:14,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:14,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:14,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:14,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:14,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:14,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:14,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:14,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005996583] [2021-01-20 11:33:14,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:14,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:14,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:14,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:14,875 INFO L87 Difference]: Start difference. First operand 16624 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:16,365 INFO L93 Difference]: Finished difference Result 19624 states and 44433 transitions. [2021-01-20 11:33:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:33:16,365 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:16,384 INFO L225 Difference]: With dead ends: 19624 [2021-01-20 11:33:16,385 INFO L226 Difference]: Without dead ends: 19084 [2021-01-20 11:33:16,386 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=681, Invalid=2399, Unknown=0, NotChecked=0, Total=3080 [2021-01-20 11:33:16,386 INFO L78 Accepts]: Start accepts. Automaton has 19084 states. Word has length 53 [2021-01-20 11:33:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:16,386 INFO L481 AbstractCegarLoop]: Abstraction has 19084 states. [2021-01-20 11:33:16,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand 19084 states. [2021-01-20 11:33:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:16,397 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:16,397 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:16,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-20 11:33:16,598 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:16,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:16,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1407530148, now seen corresponding path program 18 times [2021-01-20 11:33:16,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:16,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274746985] [2021-01-20 11:33:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:16,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274746985] [2021-01-20 11:33:16,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097364095] [2021-01-20 11:33:16,750 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 [2021-01-20 11:33:16,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:33:16,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:16,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 11:33:16,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:17,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:17,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:17,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-01-20 11:33:17,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251963108] [2021-01-20 11:33:17,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:33:17,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:17,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:33:17,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:33:17,091 INFO L87 Difference]: Start difference. First operand 19084 states. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:17,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:17,950 INFO L93 Difference]: Finished difference Result 19544 states and 44093 transitions. [2021-01-20 11:33:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:33:17,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:17,970 INFO L225 Difference]: With dead ends: 19544 [2021-01-20 11:33:17,970 INFO L226 Difference]: Without dead ends: 19392 [2021-01-20 11:33:17,971 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:33:17,971 INFO L78 Accepts]: Start accepts. Automaton has 19392 states. Word has length 53 [2021-01-20 11:33:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:17,971 INFO L481 AbstractCegarLoop]: Abstraction has 19392 states. [2021-01-20 11:33:17,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 19392 states. [2021-01-20 11:33:17,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:17,983 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:17,983 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:18,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:18,184 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:18,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1474146840, now seen corresponding path program 19 times [2021-01-20 11:33:18,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:18,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023404420] [2021-01-20 11:33:18,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:18,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023404420] [2021-01-20 11:33:18,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760820622] [2021-01-20 11:33:18,334 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 [2021-01-20 11:33:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:18,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:18,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:18,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:18,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:18,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:18,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:18,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360626463] [2021-01-20 11:33:18,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:18,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:18,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:18,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:18,673 INFO L87 Difference]: Start difference. First operand 19392 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:20,486 INFO L93 Difference]: Finished difference Result 22210 states and 50318 transitions. [2021-01-20 11:33:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-20 11:33:20,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:20,513 INFO L225 Difference]: With dead ends: 22210 [2021-01-20 11:33:20,513 INFO L226 Difference]: Without dead ends: 21622 [2021-01-20 11:33:20,514 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=739, Invalid=2683, Unknown=0, NotChecked=0, Total=3422 [2021-01-20 11:33:20,514 INFO L78 Accepts]: Start accepts. Automaton has 21622 states. Word has length 53 [2021-01-20 11:33:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:20,515 INFO L481 AbstractCegarLoop]: Abstraction has 21622 states. [2021-01-20 11:33:20,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 21622 states. [2021-01-20 11:33:20,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:20,529 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:20,529 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:20,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-20 11:33:20,730 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:20,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:20,731 INFO L82 PathProgramCache]: Analyzing trace with hash 973842700, now seen corresponding path program 20 times [2021-01-20 11:33:20,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:20,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930913943] [2021-01-20 11:33:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:20,917 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-01-20 11:33:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:21,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930913943] [2021-01-20 11:33:21,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617338354] [2021-01-20 11:33:21,066 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 [2021-01-20 11:33:21,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:21,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:21,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:21,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:21,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:21,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:21,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:21,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385991800] [2021-01-20 11:33:21,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:21,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:21,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:21,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:21,409 INFO L87 Difference]: Start difference. First operand 21622 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:22,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:22,542 INFO L93 Difference]: Finished difference Result 22534 states and 50596 transitions. [2021-01-20 11:33:22,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:33:22,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:22,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:22,572 INFO L225 Difference]: With dead ends: 22534 [2021-01-20 11:33:22,572 INFO L226 Difference]: Without dead ends: 22382 [2021-01-20 11:33:22,573 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:33:22,573 INFO L78 Accepts]: Start accepts. Automaton has 22382 states. Word has length 53 [2021-01-20 11:33:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:22,573 INFO L481 AbstractCegarLoop]: Abstraction has 22382 states. [2021-01-20 11:33:22,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:22,574 INFO L276 IsEmpty]: Start isEmpty. Operand 22382 states. [2021-01-20 11:33:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:22,592 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:22,592 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:22,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:22,793 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:22,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1593635218, now seen corresponding path program 21 times [2021-01-20 11:33:22,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:22,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211901154] [2021-01-20 11:33:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:22,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211901154] [2021-01-20 11:33:22,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400715544] [2021-01-20 11:33:22,961 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 [2021-01-20 11:33:23,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:33:23,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:23,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:23,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:23,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:23,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:23,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:23,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543715505] [2021-01-20 11:33:23,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:23,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:23,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:23,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:23,300 INFO L87 Difference]: Start difference. First operand 22382 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:24,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:24,703 INFO L93 Difference]: Finished difference Result 22804 states and 51231 transitions. [2021-01-20 11:33:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:33:24,704 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:24,727 INFO L225 Difference]: With dead ends: 22804 [2021-01-20 11:33:24,727 INFO L226 Difference]: Without dead ends: 22652 [2021-01-20 11:33:24,728 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:33:24,728 INFO L78 Accepts]: Start accepts. Automaton has 22652 states. Word has length 53 [2021-01-20 11:33:24,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:24,728 INFO L481 AbstractCegarLoop]: Abstraction has 22652 states. [2021-01-20 11:33:24,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand 22652 states. [2021-01-20 11:33:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:24,741 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:24,742 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:24,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-20 11:33:24,942 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:24,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1288041770, now seen corresponding path program 22 times [2021-01-20 11:33:24,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:24,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275827323] [2021-01-20 11:33:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:25,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275827323] [2021-01-20 11:33:25,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644207767] [2021-01-20 11:33:25,111 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 [2021-01-20 11:33:25,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:25,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:25,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:33:25,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:25,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:25,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:25,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:25,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:25,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630935093] [2021-01-20 11:33:25,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:25,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:25,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:25,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:25,467 INFO L87 Difference]: Start difference. First operand 22652 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:27,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:27,959 INFO L93 Difference]: Finished difference Result 26570 states and 60006 transitions. [2021-01-20 11:33:27,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-20 11:33:27,960 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:27,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:27,992 INFO L225 Difference]: With dead ends: 26570 [2021-01-20 11:33:27,992 INFO L226 Difference]: Without dead ends: 25772 [2021-01-20 11:33:27,993 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=883, Invalid=3277, Unknown=0, NotChecked=0, Total=4160 [2021-01-20 11:33:27,993 INFO L78 Accepts]: Start accepts. Automaton has 25772 states. Word has length 53 [2021-01-20 11:33:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:27,993 INFO L481 AbstractCegarLoop]: Abstraction has 25772 states. [2021-01-20 11:33:27,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 25772 states. [2021-01-20 11:33:28,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:28,022 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:28,022 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:28,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-20 11:33:28,236 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:28,237 INFO L82 PathProgramCache]: Analyzing trace with hash 948308753, now seen corresponding path program 23 times [2021-01-20 11:33:28,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:28,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905785861] [2021-01-20 11:33:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:28,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905785861] [2021-01-20 11:33:28,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473078928] [2021-01-20 11:33:28,436 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 [2021-01-20 11:33:28,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:33:28,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:28,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:28,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:28,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:28,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:28,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:28,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:28,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:28,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920852556] [2021-01-20 11:33:28,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:28,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:28,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:28,819 INFO L87 Difference]: Start difference. First operand 25772 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:29,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:29,332 INFO L93 Difference]: Finished difference Result 25964 states and 58311 transitions. [2021-01-20 11:33:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 11:33:29,333 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:29,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:29,366 INFO L225 Difference]: With dead ends: 25964 [2021-01-20 11:33:29,366 INFO L226 Difference]: Without dead ends: 25812 [2021-01-20 11:33:29,367 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2021-01-20 11:33:29,367 INFO L78 Accepts]: Start accepts. Automaton has 25812 states. Word has length 58 [2021-01-20 11:33:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:29,367 INFO L481 AbstractCegarLoop]: Abstraction has 25812 states. [2021-01-20 11:33:29,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 25812 states. [2021-01-20 11:33:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:29,387 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:29,387 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:29,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-20 11:33:29,604 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:29,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash -661958873, now seen corresponding path program 24 times [2021-01-20 11:33:29,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:29,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73595270] [2021-01-20 11:33:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:29,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73595270] [2021-01-20 11:33:29,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022562853] [2021-01-20 11:33:29,813 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 [2021-01-20 11:33:29,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:33:29,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:29,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:29,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:30,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:30,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:30,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:30,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:30,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:30,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785202472] [2021-01-20 11:33:30,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:30,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:30,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:30,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:30,248 INFO L87 Difference]: Start difference. First operand 25812 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:31,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:31,072 INFO L93 Difference]: Finished difference Result 26164 states and 58711 transitions. [2021-01-20 11:33:31,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:33:31,073 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:31,104 INFO L225 Difference]: With dead ends: 26164 [2021-01-20 11:33:31,104 INFO L226 Difference]: Without dead ends: 26012 [2021-01-20 11:33:31,104 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 11:33:31,105 INFO L78 Accepts]: Start accepts. Automaton has 26012 states. Word has length 58 [2021-01-20 11:33:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:31,105 INFO L481 AbstractCegarLoop]: Abstraction has 26012 states. [2021-01-20 11:33:31,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 26012 states. [2021-01-20 11:33:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:31,124 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:31,124 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:31,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-20 11:33:31,325 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:31,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash 804018355, now seen corresponding path program 25 times [2021-01-20 11:33:31,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:31,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921022041] [2021-01-20 11:33:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:31,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921022041] [2021-01-20 11:33:31,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277891945] [2021-01-20 11:33:31,510 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 [2021-01-20 11:33:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:31,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:31,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:31,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:31,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:31,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:31,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852647314] [2021-01-20 11:33:31,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:31,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:31,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:31,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:31,829 INFO L87 Difference]: Start difference. First operand 26012 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:32,515 INFO L93 Difference]: Finished difference Result 26364 states and 59111 transitions. [2021-01-20 11:33:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 11:33:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:32,548 INFO L225 Difference]: With dead ends: 26364 [2021-01-20 11:33:32,548 INFO L226 Difference]: Without dead ends: 26212 [2021-01-20 11:33:32,549 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 11:33:32,549 INFO L78 Accepts]: Start accepts. Automaton has 26212 states. Word has length 58 [2021-01-20 11:33:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:32,549 INFO L481 AbstractCegarLoop]: Abstraction has 26212 states. [2021-01-20 11:33:32,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 26212 states. [2021-01-20 11:33:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:32,571 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:32,571 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:32,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:32,773 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:32,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1502758405, now seen corresponding path program 26 times [2021-01-20 11:33:32,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:32,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169941944] [2021-01-20 11:33:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:32,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169941944] [2021-01-20 11:33:32,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291009661] [2021-01-20 11:33:32,975 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 [2021-01-20 11:33:33,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:33,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:33,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:33,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:33,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:33,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:33,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:33,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936528325] [2021-01-20 11:33:33,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:33,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:33,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:33,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:33,331 INFO L87 Difference]: Start difference. First operand 26212 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:34,393 INFO L93 Difference]: Finished difference Result 26804 states and 60119 transitions. [2021-01-20 11:33:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 11:33:34,393 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:34,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:34,426 INFO L225 Difference]: With dead ends: 26804 [2021-01-20 11:33:34,426 INFO L226 Difference]: Without dead ends: 26412 [2021-01-20 11:33:34,427 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=377, Invalid=1183, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:33:34,427 INFO L78 Accepts]: Start accepts. Automaton has 26412 states. Word has length 58 [2021-01-20 11:33:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:34,427 INFO L481 AbstractCegarLoop]: Abstraction has 26412 states. [2021-01-20 11:33:34,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:34,427 INFO L276 IsEmpty]: Start isEmpty. Operand 26412 states. [2021-01-20 11:33:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:34,447 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:34,447 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:34,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-20 11:33:34,663 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:34,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:34,663 INFO L82 PathProgramCache]: Analyzing trace with hash 667451665, now seen corresponding path program 27 times [2021-01-20 11:33:34,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:34,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758332209] [2021-01-20 11:33:34,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:34,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758332209] [2021-01-20 11:33:34,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395775671] [2021-01-20 11:33:34,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:34,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:33:34,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:34,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:34,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:35,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:35,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:35,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:35,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:35,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:35,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148486815] [2021-01-20 11:33:35,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:35,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:35,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:35,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:35,267 INFO L87 Difference]: Start difference. First operand 26412 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:36,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:36,109 INFO L93 Difference]: Finished difference Result 26724 states and 59831 transitions. [2021-01-20 11:33:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:33:36,110 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:36,144 INFO L225 Difference]: With dead ends: 26724 [2021-01-20 11:33:36,144 INFO L226 Difference]: Without dead ends: 26572 [2021-01-20 11:33:36,145 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:33:36,145 INFO L78 Accepts]: Start accepts. Automaton has 26572 states. Word has length 58 [2021-01-20 11:33:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:36,146 INFO L481 AbstractCegarLoop]: Abstraction has 26572 states. [2021-01-20 11:33:36,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 26572 states. [2021-01-20 11:33:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:36,168 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:36,168 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:36,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-20 11:33:36,369 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1750112601, now seen corresponding path program 28 times [2021-01-20 11:33:36,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:36,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597855078] [2021-01-20 11:33:36,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:36,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597855078] [2021-01-20 11:33:36,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664111591] [2021-01-20 11:33:36,552 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 [2021-01-20 11:33:36,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:36,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:36,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:36,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:36,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:36,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:36,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:36,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078094927] [2021-01-20 11:33:36,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:36,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:36,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:36,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:36,894 INFO L87 Difference]: Start difference. First operand 26572 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:37,869 INFO L93 Difference]: Finished difference Result 26964 states and 60311 transitions. [2021-01-20 11:33:37,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:33:37,870 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:37,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:37,904 INFO L225 Difference]: With dead ends: 26964 [2021-01-20 11:33:37,904 INFO L226 Difference]: Without dead ends: 26812 [2021-01-20 11:33:37,904 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:33:37,905 INFO L78 Accepts]: Start accepts. Automaton has 26812 states. Word has length 58 [2021-01-20 11:33:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:37,905 INFO L481 AbstractCegarLoop]: Abstraction has 26812 states. [2021-01-20 11:33:37,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 26812 states. [2021-01-20 11:33:37,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:37,931 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:37,931 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:38,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:38,132 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:38,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:38,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1051372551, now seen corresponding path program 29 times [2021-01-20 11:33:38,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:38,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513487288] [2021-01-20 11:33:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:38,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513487288] [2021-01-20 11:33:38,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333954223] [2021-01-20 11:33:38,340 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 [2021-01-20 11:33:38,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:33:38,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:38,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:38,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:38,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:38,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:38,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:38,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662324462] [2021-01-20 11:33:38,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:38,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:38,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:38,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:38,734 INFO L87 Difference]: Start difference. First operand 26812 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:39,809 INFO L93 Difference]: Finished difference Result 27044 states and 60471 transitions. [2021-01-20 11:33:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:33:39,810 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:39,845 INFO L225 Difference]: With dead ends: 27044 [2021-01-20 11:33:39,845 INFO L226 Difference]: Without dead ends: 26892 [2021-01-20 11:33:39,845 INFO L769 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 [2021-01-20 11:33:39,845 INFO L78 Accepts]: Start accepts. Automaton has 26892 states. Word has length 58 [2021-01-20 11:33:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:39,846 INFO L481 AbstractCegarLoop]: Abstraction has 26892 states. [2021-01-20 11:33:39,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 26892 states. [2021-01-20 11:33:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:39,871 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:39,871 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:40,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-20 11:33:40,072 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:40,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:40,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1946130335, now seen corresponding path program 11 times [2021-01-20 11:33:40,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:40,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932806896] [2021-01-20 11:33:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:40,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932806896] [2021-01-20 11:33:40,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50805730] [2021-01-20 11:33:40,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:40,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 11:33:40,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:40,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:40,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:40,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:40,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:40,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:40,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118403254] [2021-01-20 11:33:40,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:40,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:40,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:40,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:40,656 INFO L87 Difference]: Start difference. First operand 26892 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:41,872 INFO L93 Difference]: Finished difference Result 27404 states and 61319 transitions. [2021-01-20 11:33:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:33:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:41,902 INFO L225 Difference]: With dead ends: 27404 [2021-01-20 11:33:41,902 INFO L226 Difference]: Without dead ends: 27012 [2021-01-20 11:33:41,902 INFO L769 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 [2021-01-20 11:33:41,902 INFO L78 Accepts]: Start accepts. Automaton has 27012 states. Word has length 58 [2021-01-20 11:33:41,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:41,903 INFO L481 AbstractCegarLoop]: Abstraction has 27012 states. [2021-01-20 11:33:41,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:41,903 INFO L276 IsEmpty]: Start isEmpty. Operand 27012 states. [2021-01-20 11:33:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:41,920 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:41,920 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:42,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:42,121 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:42,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2001000967, now seen corresponding path program 30 times [2021-01-20 11:33:42,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:42,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856005972] [2021-01-20 11:33:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:42,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856005972] [2021-01-20 11:33:42,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462178665] [2021-01-20 11:33:42,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:42,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:33:42,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:42,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:42,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:42,680 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:42,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:42,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:42,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:42,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:42,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023669297] [2021-01-20 11:33:42,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:42,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:42,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:42,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:42,744 INFO L87 Difference]: Start difference. First operand 27012 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:43,701 INFO L93 Difference]: Finished difference Result 27244 states and 60871 transitions. [2021-01-20 11:33:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:33:43,702 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:43,732 INFO L225 Difference]: With dead ends: 27244 [2021-01-20 11:33:43,732 INFO L226 Difference]: Without dead ends: 27092 [2021-01-20 11:33:43,733 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:33:43,733 INFO L78 Accepts]: Start accepts. Automaton has 27092 states. Word has length 58 [2021-01-20 11:33:43,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:43,733 INFO L481 AbstractCegarLoop]: Abstraction has 27092 states. [2021-01-20 11:33:43,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:43,734 INFO L276 IsEmpty]: Start isEmpty. Operand 27092 states. [2021-01-20 11:33:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:43,755 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:43,755 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:43,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-20 11:33:43,956 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:43,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:43,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1916523223, now seen corresponding path program 31 times [2021-01-20 11:33:43,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:43,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595712315] [2021-01-20 11:33:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:44,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595712315] [2021-01-20 11:33:44,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10298393] [2021-01-20 11:33:44,151 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:44,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:44,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:44,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:44,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:44,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:44,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:44,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:44,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:44,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048186117] [2021-01-20 11:33:44,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:44,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:44,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:44,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:44,503 INFO L87 Difference]: Start difference. First operand 27092 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:45,281 INFO L93 Difference]: Finished difference Result 27284 states and 60951 transitions. [2021-01-20 11:33:45,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 11:33:45,281 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:45,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:45,306 INFO L225 Difference]: With dead ends: 27284 [2021-01-20 11:33:45,307 INFO L226 Difference]: Without dead ends: 27132 [2021-01-20 11:33:45,307 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-01-20 11:33:45,307 INFO L78 Accepts]: Start accepts. Automaton has 27132 states. Word has length 58 [2021-01-20 11:33:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:45,307 INFO L481 AbstractCegarLoop]: Abstraction has 27132 states. [2021-01-20 11:33:45,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 27132 states. [2021-01-20 11:33:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:45,325 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:45,325 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:45,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-20 11:33:45,526 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:45,527 INFO L82 PathProgramCache]: Analyzing trace with hash 306255597, now seen corresponding path program 32 times [2021-01-20 11:33:45,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:45,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649079788] [2021-01-20 11:33:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:45,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649079788] [2021-01-20 11:33:45,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555848420] [2021-01-20 11:33:45,714 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:45,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:45,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:45,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:45,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:46,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:46,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:46,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:46,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:46,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:46,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507349165] [2021-01-20 11:33:46,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:46,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:46,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:46,116 INFO L87 Difference]: Start difference. First operand 27132 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:46,954 INFO L93 Difference]: Finished difference Result 27484 states and 61351 transitions. [2021-01-20 11:33:46,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:33:46,955 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:46,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:46,989 INFO L225 Difference]: With dead ends: 27484 [2021-01-20 11:33:46,989 INFO L226 Difference]: Without dead ends: 27332 [2021-01-20 11:33:46,989 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 11:33:46,989 INFO L78 Accepts]: Start accepts. Automaton has 27332 states. Word has length 58 [2021-01-20 11:33:46,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:46,990 INFO L481 AbstractCegarLoop]: Abstraction has 27332 states. [2021-01-20 11:33:46,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 27332 states. [2021-01-20 11:33:47,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:47,010 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:47,010 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:47,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-20 11:33:47,211 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:47,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1772232825, now seen corresponding path program 33 times [2021-01-20 11:33:47,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:47,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915382881] [2021-01-20 11:33:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:47,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915382881] [2021-01-20 11:33:47,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727058112] [2021-01-20 11:33:47,391 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 [2021-01-20 11:33:47,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:33:47,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:47,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:47,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:47,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:47,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:47,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:47,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487813599] [2021-01-20 11:33:47,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:47,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:47,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:47,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:47,732 INFO L87 Difference]: Start difference. First operand 27332 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:48,866 INFO L93 Difference]: Finished difference Result 27684 states and 61751 transitions. [2021-01-20 11:33:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:33:48,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:48,895 INFO L225 Difference]: With dead ends: 27684 [2021-01-20 11:33:48,896 INFO L226 Difference]: Without dead ends: 27532 [2021-01-20 11:33:48,896 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=413, Invalid=1227, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:33:48,896 INFO L78 Accepts]: Start accepts. Automaton has 27532 states. Word has length 58 [2021-01-20 11:33:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:48,896 INFO L481 AbstractCegarLoop]: Abstraction has 27532 states. [2021-01-20 11:33:48,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 27532 states. [2021-01-20 11:33:48,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:48,914 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:48,914 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:49,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-01-20 11:33:49,115 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:49,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1823994421, now seen corresponding path program 34 times [2021-01-20 11:33:49,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:49,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942354973] [2021-01-20 11:33:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:49,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942354973] [2021-01-20 11:33:49,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220501358] [2021-01-20 11:33:49,295 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:49,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:49,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:49,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:49,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:49,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:49,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:49,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:49,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443511863] [2021-01-20 11:33:49,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:49,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:49,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:49,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:49,659 INFO L87 Difference]: Start difference. First operand 27532 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:50,932 INFO L93 Difference]: Finished difference Result 28124 states and 62759 transitions. [2021-01-20 11:33:50,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 11:33:50,932 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:50,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:50,966 INFO L225 Difference]: With dead ends: 28124 [2021-01-20 11:33:50,966 INFO L226 Difference]: Without dead ends: 27732 [2021-01-20 11:33:50,966 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:33:50,966 INFO L78 Accepts]: Start accepts. Automaton has 27732 states. Word has length 58 [2021-01-20 11:33:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:50,967 INFO L481 AbstractCegarLoop]: Abstraction has 27732 states. [2021-01-20 11:33:50,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 27732 states. [2021-01-20 11:33:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:50,988 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:50,988 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:51,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:51,189 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:51,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:51,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1635666135, now seen corresponding path program 35 times [2021-01-20 11:33:51,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:51,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153970785] [2021-01-20 11:33:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:51,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153970785] [2021-01-20 11:33:51,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299023741] [2021-01-20 11:33:51,366 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 [2021-01-20 11:33:51,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 11:33:51,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:51,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:51,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:51,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:51,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:51,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:51,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:51,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:51,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819636450] [2021-01-20 11:33:51,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:51,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:51,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:51,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:51,757 INFO L87 Difference]: Start difference. First operand 27732 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:52,891 INFO L93 Difference]: Finished difference Result 27964 states and 62311 transitions. [2021-01-20 11:33:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:33:52,892 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:52,935 INFO L225 Difference]: With dead ends: 27964 [2021-01-20 11:33:52,936 INFO L226 Difference]: Without dead ends: 27812 [2021-01-20 11:33:52,936 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:33:52,936 INFO L78 Accepts]: Start accepts. Automaton has 27812 states. Word has length 58 [2021-01-20 11:33:52,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:52,936 INFO L481 AbstractCegarLoop]: Abstraction has 27812 states. [2021-01-20 11:33:52,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 27812 states. [2021-01-20 11:33:52,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:52,961 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:52,961 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:53,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-20 11:33:53,162 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:53,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:53,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1679925551, now seen corresponding path program 36 times [2021-01-20 11:33:53,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:53,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134725924] [2021-01-20 11:33:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:53,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134725924] [2021-01-20 11:33:53,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542582049] [2021-01-20 11:33:53,366 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 [2021-01-20 11:33:53,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:33:53,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:53,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:53,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:53,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:53,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:53,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:53,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:53,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:53,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474114442] [2021-01-20 11:33:53,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:53,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:53,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:53,802 INFO L87 Difference]: Start difference. First operand 27812 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:54,530 INFO L93 Difference]: Finished difference Result 28244 states and 62871 transitions. [2021-01-20 11:33:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 11:33:54,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:54,568 INFO L225 Difference]: With dead ends: 28244 [2021-01-20 11:33:54,568 INFO L226 Difference]: Without dead ends: 28092 [2021-01-20 11:33:54,568 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 11:33:54,568 INFO L78 Accepts]: Start accepts. Automaton has 28092 states. Word has length 58 [2021-01-20 11:33:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:54,569 INFO L481 AbstractCegarLoop]: Abstraction has 28092 states. [2021-01-20 11:33:54,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 28092 states. [2021-01-20 11:33:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:54,595 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:54,595 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:54,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:54,796 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1004774119, now seen corresponding path program 37 times [2021-01-20 11:33:54,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:54,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058723007] [2021-01-20 11:33:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:54,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058723007] [2021-01-20 11:33:54,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834799307] [2021-01-20 11:33:54,995 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 [2021-01-20 11:33:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:55,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:55,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:55,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:55,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:55,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:55,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:55,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:55,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468286332] [2021-01-20 11:33:55,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:55,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:55,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:55,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:55,469 INFO L87 Difference]: Start difference. First operand 28092 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:56,428 INFO L93 Difference]: Finished difference Result 28524 states and 63431 transitions. [2021-01-20 11:33:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:33:56,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:56,464 INFO L225 Difference]: With dead ends: 28524 [2021-01-20 11:33:56,465 INFO L226 Difference]: Without dead ends: 28372 [2021-01-20 11:33:56,465 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=983, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:33:56,465 INFO L78 Accepts]: Start accepts. Automaton has 28372 states. Word has length 58 [2021-01-20 11:33:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:56,466 INFO L481 AbstractCegarLoop]: Abstraction has 28372 states. [2021-01-20 11:33:56,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 28372 states. [2021-01-20 11:33:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:56,501 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:56,501 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:56,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-20 11:33:56,710 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:56,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:56,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1149157015, now seen corresponding path program 38 times [2021-01-20 11:33:56,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:56,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771653644] [2021-01-20 11:33:56,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:56,941 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-20 11:33:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:57,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771653644] [2021-01-20 11:33:57,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626488565] [2021-01-20 11:33:57,088 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 [2021-01-20 11:33:57,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:57,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:57,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:57,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:57,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:57,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:57,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:57,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:57,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:57,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309327221] [2021-01-20 11:33:57,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:57,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:57,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:57,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:57,462 INFO L87 Difference]: Start difference. First operand 28372 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:58,185 INFO L93 Difference]: Finished difference Result 29044 states and 64471 transitions. [2021-01-20 11:33:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:33:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:58,219 INFO L225 Difference]: With dead ends: 29044 [2021-01-20 11:33:58,219 INFO L226 Difference]: Without dead ends: 28892 [2021-01-20 11:33:58,220 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 11:33:58,220 INFO L78 Accepts]: Start accepts. Automaton has 28892 states. Word has length 58 [2021-01-20 11:33:58,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:58,220 INFO L481 AbstractCegarLoop]: Abstraction has 28892 states. [2021-01-20 11:33:58,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:58,222 INFO L276 IsEmpty]: Start isEmpty. Operand 28892 states. [2021-01-20 11:33:58,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:58,247 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:58,248 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:58,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-20 11:33:58,448 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:58,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:58,449 INFO L82 PathProgramCache]: Analyzing trace with hash -563161397, now seen corresponding path program 39 times [2021-01-20 11:33:58,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:58,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444668331] [2021-01-20 11:33:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:58,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444668331] [2021-01-20 11:33:58,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408555366] [2021-01-20 11:33:58,620 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 [2021-01-20 11:33:58,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:33:58,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:58,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:58,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:59,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:59,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:59,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:59,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:59,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:59,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434511638] [2021-01-20 11:33:59,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:59,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:59,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:59,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:59,319 INFO L87 Difference]: Start difference. First operand 28892 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:01,861 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 39 [2021-01-20 11:34:04,019 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 37 [2021-01-20 11:34:33,202 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-01-20 11:34:55,767 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2021-01-20 11:35:00,848 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-01-20 11:35:36,808 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 41 [2021-01-20 11:36:15,736 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-01-20 11:36:21,966 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2021-01-20 11:36:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:21,997 INFO L93 Difference]: Finished difference Result 30938 states and 68969 transitions. [2021-01-20 11:36:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 11:36:21,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:22,030 INFO L225 Difference]: With dead ends: 30938 [2021-01-20 11:36:22,030 INFO L226 Difference]: Without dead ends: 30398 [2021-01-20 11:36:22,031 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=594, Invalid=2044, Unknown=14, NotChecked=0, Total=2652 [2021-01-20 11:36:22,031 INFO L78 Accepts]: Start accepts. Automaton has 30398 states. Word has length 58 [2021-01-20 11:36:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:22,031 INFO L481 AbstractCegarLoop]: Abstraction has 30398 states. [2021-01-20 11:36:22,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:22,031 INFO L276 IsEmpty]: Start isEmpty. Operand 30398 states. [2021-01-20 11:36:22,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:22,050 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:22,050 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:22,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:22,251 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:22,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:22,252 INFO L82 PathProgramCache]: Analyzing trace with hash -355140559, now seen corresponding path program 40 times [2021-01-20 11:36:22,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:22,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462845290] [2021-01-20 11:36:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:22,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462845290] [2021-01-20 11:36:22,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123190863] [2021-01-20 11:36:22,426 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 [2021-01-20 11:36:22,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:36:22,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:22,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:36:22,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:22,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:22,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:22,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:22,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:22,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:22,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141053551] [2021-01-20 11:36:22,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:22,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:22,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:22,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:22,913 INFO L87 Difference]: Start difference. First operand 30398 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:24,315 INFO L93 Difference]: Finished difference Result 31179 states and 69216 transitions. [2021-01-20 11:36:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:36:24,315 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:24,351 INFO L225 Difference]: With dead ends: 31179 [2021-01-20 11:36:24,352 INFO L226 Difference]: Without dead ends: 31027 [2021-01-20 11:36:24,352 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:36:24,352 INFO L78 Accepts]: Start accepts. Automaton has 31027 states. Word has length 58 [2021-01-20 11:36:24,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:24,352 INFO L481 AbstractCegarLoop]: Abstraction has 31027 states. [2021-01-20 11:36:24,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:24,352 INFO L276 IsEmpty]: Start isEmpty. Operand 31027 states. [2021-01-20 11:36:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:24,493 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:24,493 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:24,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-20 11:36:24,694 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:24,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1058149749, now seen corresponding path program 41 times [2021-01-20 11:36:24,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:24,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418958403] [2021-01-20 11:36:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:24,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418958403] [2021-01-20 11:36:24,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726857754] [2021-01-20 11:36:24,904 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:24,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:36:24,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:24,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:24,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:25,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:36:25,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:25,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:25,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:25,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467313724] [2021-01-20 11:36:25,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:25,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:25,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:25,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:25,499 INFO L87 Difference]: Start difference. First operand 31027 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:28,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:28,347 INFO L93 Difference]: Finished difference Result 33567 states and 74694 transitions. [2021-01-20 11:36:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-20 11:36:28,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:28,381 INFO L225 Difference]: With dead ends: 33567 [2021-01-20 11:36:28,381 INFO L226 Difference]: Without dead ends: 33027 [2021-01-20 11:36:28,382 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=795, Invalid=2745, Unknown=0, NotChecked=0, Total=3540 [2021-01-20 11:36:28,382 INFO L78 Accepts]: Start accepts. Automaton has 33027 states. Word has length 58 [2021-01-20 11:36:28,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:28,382 INFO L481 AbstractCegarLoop]: Abstraction has 33027 states. [2021-01-20 11:36:28,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 33027 states. [2021-01-20 11:36:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:28,404 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:28,404 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:28,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-20 11:36:28,613 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:28,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:28,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2140480549, now seen corresponding path program 42 times [2021-01-20 11:36:28,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:28,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105923817] [2021-01-20 11:36:28,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:28,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105923817] [2021-01-20 11:36:28,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357775628] [2021-01-20 11:36:28,825 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:28,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:36:28,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:28,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:28,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:29,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:29,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:29,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:29,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600732972] [2021-01-20 11:36:29,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:29,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:29,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:29,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:29,212 INFO L87 Difference]: Start difference. First operand 33027 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:30,769 INFO L93 Difference]: Finished difference Result 33759 states and 74946 transitions. [2021-01-20 11:36:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:36:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:30,808 INFO L225 Difference]: With dead ends: 33759 [2021-01-20 11:36:30,808 INFO L226 Difference]: Without dead ends: 33607 [2021-01-20 11:36:30,808 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:36:30,808 INFO L78 Accepts]: Start accepts. Automaton has 33607 states. Word has length 58 [2021-01-20 11:36:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:30,809 INFO L481 AbstractCegarLoop]: Abstraction has 33607 states. [2021-01-20 11:36:30,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 33607 states. [2021-01-20 11:36:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:30,832 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:30,832 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:31,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-20 11:36:31,033 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:31,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:31,034 INFO L82 PathProgramCache]: Analyzing trace with hash -741196439, now seen corresponding path program 43 times [2021-01-20 11:36:31,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:31,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871350844] [2021-01-20 11:36:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:31,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871350844] [2021-01-20 11:36:31,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998140127] [2021-01-20 11:36:31,263 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 [2021-01-20 11:36:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:31,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:31,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:31,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:36:31,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:31,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:31,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:31,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299307676] [2021-01-20 11:36:31,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:31,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:31,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:31,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:31,647 INFO L87 Difference]: Start difference. First operand 33607 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:32,173 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2021-01-20 11:36:34,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:34,521 INFO L93 Difference]: Finished difference Result 37685 states and 83661 transitions. [2021-01-20 11:36:34,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-20 11:36:34,522 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:34,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:34,571 INFO L225 Difference]: With dead ends: 37685 [2021-01-20 11:36:34,571 INFO L226 Difference]: Without dead ends: 36887 [2021-01-20 11:36:34,572 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=950, Invalid=3606, Unknown=0, NotChecked=0, Total=4556 [2021-01-20 11:36:34,572 INFO L78 Accepts]: Start accepts. Automaton has 36887 states. Word has length 58 [2021-01-20 11:36:34,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:34,572 INFO L481 AbstractCegarLoop]: Abstraction has 36887 states. [2021-01-20 11:36:34,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:34,572 INFO L276 IsEmpty]: Start isEmpty. Operand 36887 states. [2021-01-20 11:36:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:34,598 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:34,598 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:34,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:34,799 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:34,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1706793101, now seen corresponding path program 44 times [2021-01-20 11:36:34,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:34,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111774] [2021-01-20 11:36:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:35,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111774] [2021-01-20 11:36:35,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101592812] [2021-01-20 11:36:35,013 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:35,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:36:35,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:35,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:35,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:35,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:35,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:35,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:35,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972798901] [2021-01-20 11:36:35,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:35,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:35,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:35,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:35,459 INFO L87 Difference]: Start difference. First operand 36887 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:37,307 INFO L93 Difference]: Finished difference Result 38686 states and 85180 transitions. [2021-01-20 11:36:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 11:36:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:37,360 INFO L225 Difference]: With dead ends: 38686 [2021-01-20 11:36:37,360 INFO L226 Difference]: Without dead ends: 38534 [2021-01-20 11:36:37,365 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:36:37,365 INFO L78 Accepts]: Start accepts. Automaton has 38534 states. Word has length 58 [2021-01-20 11:36:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:37,366 INFO L481 AbstractCegarLoop]: Abstraction has 38534 states. [2021-01-20 11:36:37,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 38534 states. [2021-01-20 11:36:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:37,393 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:37,393 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:37,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:37,594 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:37,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1968381677, now seen corresponding path program 45 times [2021-01-20 11:36:37,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:37,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570245518] [2021-01-20 11:36:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:37,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570245518] [2021-01-20 11:36:37,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427509059] [2021-01-20 11:36:37,822 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:37,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:36:37,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:37,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:37,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:38,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:38,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:38,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:38,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53689600] [2021-01-20 11:36:38,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:38,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:38,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:38,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:38,231 INFO L87 Difference]: Start difference. First operand 38534 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:40,514 INFO L93 Difference]: Finished difference Result 39436 states and 86775 transitions. [2021-01-20 11:36:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 11:36:40,515 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 [2021-01-20 11:36:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:40,563 INFO L225 Difference]: With dead ends: 39436 [2021-01-20 11:36:40,563 INFO L226 Difference]: Without dead ends: 39284 [2021-01-20 11:36:40,564 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=637, Invalid=2015, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 11:36:40,564 INFO L78 Accepts]: Start accepts. Automaton has 39284 states. Word has length 58 [2021-01-20 11:36:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:40,564 INFO L481 AbstractCegarLoop]: Abstraction has 39284 states. [2021-01-20 11:36:40,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 39284 states. [2021-01-20 11:36:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:40,586 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:40,586 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:40,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:40,787 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:40,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:40,788 INFO L82 PathProgramCache]: Analyzing trace with hash -555091369, now seen corresponding path program 46 times [2021-01-20 11:36:40,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:40,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164843252] [2021-01-20 11:36:40,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:41,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164843252] [2021-01-20 11:36:41,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460009785] [2021-01-20 11:36:41,212 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:41,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:36:41,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:41,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:36:41,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:41,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:36:41,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:41,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:41,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:41,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517168620] [2021-01-20 11:36:41,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:41,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:41,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:41,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:41,736 INFO L87 Difference]: Start difference. First operand 39284 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:44,036 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 28 [2021-01-20 11:36:48,294 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-01-20 11:36:52,740 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-01-20 11:36:56,861 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 30 [2021-01-20 11:37:00,977 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 26 [2021-01-20 11:37:36,292 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-01-20 11:37:59,199 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-01-20 11:38:13,896 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-01-20 11:38:24,957 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-01-20 11:38:51,608 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-01-20 11:38:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:38:51,932 INFO L93 Difference]: Finished difference Result 42908 states and 94931 transitions. [2021-01-20 11:38:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-20 11:38:51,934 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:38:51,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:38:52,015 INFO L225 Difference]: With dead ends: 42908 [2021-01-20 11:38:52,015 INFO L226 Difference]: Without dead ends: 42368 [2021-01-20 11:38:52,016 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=970, Invalid=3313, Unknown=7, NotChecked=0, Total=4290 [2021-01-20 11:38:52,017 INFO L78 Accepts]: Start accepts. Automaton has 42368 states. Word has length 58 [2021-01-20 11:38:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:38:52,017 INFO L481 AbstractCegarLoop]: Abstraction has 42368 states. [2021-01-20 11:38:52,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:38:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 42368 states. [2021-01-20 11:38:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:38:52,061 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:38:52,061 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:38:52,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:38:52,269 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:38:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:38:52,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2077267071, now seen corresponding path program 47 times [2021-01-20 11:38:52,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:38:52,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706501308] [2021-01-20 11:38:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:38:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:38:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:38:52,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706501308] [2021-01-20 11:38:52,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385238961] [2021-01-20 11:38:52,636 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:38:52,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:38:52,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:38:52,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:38:52,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:38:53,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:38:53,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:38:53,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:38:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:38:53,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:38:53,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:38:53,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530710669] [2021-01-20 11:38:53,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:38:53,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:38:53,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:38:53,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:38:53,177 INFO L87 Difference]: Start difference. First operand 42368 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:38:55,283 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 13 [2021-01-20 11:38:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:38:55,766 INFO L93 Difference]: Finished difference Result 43230 states and 95348 transitions. [2021-01-20 11:38:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 11:38:55,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:38:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:38:55,842 INFO L225 Difference]: With dead ends: 43230 [2021-01-20 11:38:55,842 INFO L226 Difference]: Without dead ends: 43078 [2021-01-20 11:38:55,843 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=548, Invalid=1804, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 11:38:55,843 INFO L78 Accepts]: Start accepts. Automaton has 43078 states. Word has length 58 [2021-01-20 11:38:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:38:55,843 INFO L481 AbstractCegarLoop]: Abstraction has 43078 states. [2021-01-20 11:38:55,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:38:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 43078 states. [2021-01-20 11:38:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:38:55,880 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:38:55,880 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:38:56,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-01-20 11:38:56,081 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:38:56,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:38:56,082 INFO L82 PathProgramCache]: Analyzing trace with hash -804409917, now seen corresponding path program 48 times [2021-01-20 11:38:56,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:38:56,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47725171] [2021-01-20 11:38:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:38:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:38:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:38:56,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47725171] [2021-01-20 11:38:56,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87697186] [2021-01-20 11:38:56,426 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:38:56,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:38:56,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:38:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:38:56,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:38:56,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:38:57,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:38:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:38:57,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:38:57,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:38:57,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596152551] [2021-01-20 11:38:57,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:38:57,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:38:57,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:38:57,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:38:57,208 INFO L87 Difference]: Start difference. First operand 43078 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:38:58,115 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 17 [2021-01-20 11:39:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:01,458 INFO L93 Difference]: Finished difference Result 46148 states and 102171 transitions. [2021-01-20 11:39:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-20 11:39:01,460 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 [2021-01-20 11:39:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:01,534 INFO L225 Difference]: With dead ends: 46148 [2021-01-20 11:39:01,534 INFO L226 Difference]: Without dead ends: 45608 [2021-01-20 11:39:01,535 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=861, Invalid=3171, Unknown=0, NotChecked=0, Total=4032 [2021-01-20 11:39:01,535 INFO L78 Accepts]: Start accepts. Automaton has 45608 states. Word has length 58 [2021-01-20 11:39:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:01,535 INFO L481 AbstractCegarLoop]: Abstraction has 45608 states. [2021-01-20 11:39:01,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 45608 states. [2021-01-20 11:39:01,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:39:01,571 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:01,571 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:39:01,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:01,773 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:01,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:01,774 INFO L82 PathProgramCache]: Analyzing trace with hash 271832241, now seen corresponding path program 49 times [2021-01-20 11:39:01,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:01,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629128691] [2021-01-20 11:39:01,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:02,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629128691] [2021-01-20 11:39:02,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871914076] [2021-01-20 11:39:02,056 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:39:02,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:02,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:02,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:02,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:39:02,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100802097] [2021-01-20 11:39:02,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:39:02,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:39:02,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:39:02,596 INFO L87 Difference]: Start difference. First operand 45608 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:05,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:05,142 INFO L93 Difference]: Finished difference Result 46228 states and 102151 transitions. [2021-01-20 11:39:05,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 11:39:05,144 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:39:05,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:05,229 INFO L225 Difference]: With dead ends: 46228 [2021-01-20 11:39:05,229 INFO L226 Difference]: Without dead ends: 46076 [2021-01-20 11:39:05,230 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 11:39:05,230 INFO L78 Accepts]: Start accepts. Automaton has 46076 states. Word has length 58 [2021-01-20 11:39:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:05,230 INFO L481 AbstractCegarLoop]: Abstraction has 46076 states. [2021-01-20 11:39:05,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 46076 states. [2021-01-20 11:39:05,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:39:05,270 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:05,270 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:39:05,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-20 11:39:05,471 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:05,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:05,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1685122549, now seen corresponding path program 50 times [2021-01-20 11:39:05,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:05,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822003597] [2021-01-20 11:39:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:05,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822003597] [2021-01-20 11:39:05,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021729739] [2021-01-20 11:39:05,779 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:05,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:39:05,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:39:05,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:39:05,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:06,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:39:06,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:06,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:06,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:39:06,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825682571] [2021-01-20 11:39:06,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:39:06,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:06,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:39:06,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:39:06,282 INFO L87 Difference]: Start difference. First operand 46076 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:10,025 INFO L93 Difference]: Finished difference Result 48624 states and 107741 transitions. [2021-01-20 11:39:10,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-20 11:39:10,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:39:10,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:10,120 INFO L225 Difference]: With dead ends: 48624 [2021-01-20 11:39:10,120 INFO L226 Difference]: Without dead ends: 48036 [2021-01-20 11:39:10,121 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=887, Invalid=3273, Unknown=0, NotChecked=0, Total=4160 [2021-01-20 11:39:10,121 INFO L78 Accepts]: Start accepts. Automaton has 48036 states. Word has length 58 [2021-01-20 11:39:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:10,121 INFO L481 AbstractCegarLoop]: Abstraction has 48036 states. [2021-01-20 11:39:10,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 48036 states. [2021-01-20 11:39:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:39:10,162 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:10,162 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:39:10,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:10,374 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:10,375 INFO L82 PathProgramCache]: Analyzing trace with hash -161855207, now seen corresponding path program 51 times [2021-01-20 11:39:10,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:10,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632041229] [2021-01-20 11:39:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:10,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632041229] [2021-01-20 11:39:10,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012134349] [2021-01-20 11:39:10,661 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:10,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:39:10,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:39:10,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:39:10,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:11,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:11,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:11,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:39:11,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450625814] [2021-01-20 11:39:11,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:39:11,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:11,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:39:11,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:39:11,343 INFO L87 Difference]: Start difference. First operand 48036 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:13,585 INFO L93 Difference]: Finished difference Result 50115 states and 110353 transitions. [2021-01-20 11:39:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 11:39:13,587 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:39:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:13,843 INFO L225 Difference]: With dead ends: 50115 [2021-01-20 11:39:13,844 INFO L226 Difference]: Without dead ends: 49963 [2021-01-20 11:39:13,844 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=530, Invalid=1822, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 11:39:13,844 INFO L78 Accepts]: Start accepts. Automaton has 49963 states. Word has length 58 [2021-01-20 11:39:13,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:13,844 INFO L481 AbstractCegarLoop]: Abstraction has 49963 states. [2021-01-20 11:39:13,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 49963 states. [2021-01-20 11:39:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:39:13,881 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:13,881 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:39:14,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-20 11:39:14,085 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:14,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:14,085 INFO L82 PathProgramCache]: Analyzing trace with hash 457937311, now seen corresponding path program 52 times [2021-01-20 11:39:14,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:14,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160039511] [2021-01-20 11:39:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:14,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160039511] [2021-01-20 11:39:14,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074439641] [2021-01-20 11:39:14,373 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:14,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:39:14,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:39:14,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:39:14,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:14,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:14,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:14,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:39:14,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544962193] [2021-01-20 11:39:14,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:39:14,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:14,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:39:14,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:39:14,854 INFO L87 Difference]: Start difference. First operand 49963 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:17,020 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2021-01-20 11:39:17,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:17,949 INFO L93 Difference]: Finished difference Result 51051 states and 112605 transitions. [2021-01-20 11:39:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-20 11:39:17,951 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 [2021-01-20 11:39:17,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:18,055 INFO L225 Difference]: With dead ends: 51051 [2021-01-20 11:39:18,056 INFO L226 Difference]: Without dead ends: 50899 [2021-01-20 11:39:18,056 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=855, Invalid=2805, Unknown=0, NotChecked=0, Total=3660 [2021-01-20 11:39:18,056 INFO L78 Accepts]: Start accepts. Automaton has 50899 states. Word has length 58 [2021-01-20 11:39:18,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:18,057 INFO L481 AbstractCegarLoop]: Abstraction has 50899 states. [2021-01-20 11:39:18,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 50899 states. [2021-01-20 11:39:18,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:39:18,100 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:18,100 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:39:18,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:18,302 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:18,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:18,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1871227619, now seen corresponding path program 53 times [2021-01-20 11:39:18,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:18,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242298961] [2021-01-20 11:39:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:18,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242298961] [2021-01-20 11:39:18,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405664564] [2021-01-20 11:39:18,632 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:18,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:39:18,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:39:18,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:39:18,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:19,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:39:19,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:19,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:19,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:39:19,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222527251] [2021-01-20 11:39:19,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:39:19,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:19,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:39:19,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:39:19,108 INFO L87 Difference]: Start difference. First operand 50899 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:20,589 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 14 [2021-01-20 11:39:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:23,203 INFO L93 Difference]: Finished difference Result 53519 states and 118243 transitions. [2021-01-20 11:39:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-20 11:39:23,205 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:39:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:23,315 INFO L225 Difference]: With dead ends: 53519 [2021-01-20 11:39:23,315 INFO L226 Difference]: Without dead ends: 52979 [2021-01-20 11:39:23,316 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1206, Invalid=4344, Unknown=0, NotChecked=0, Total=5550 [2021-01-20 11:39:23,316 INFO L78 Accepts]: Start accepts. Automaton has 52979 states. Word has length 58 [2021-01-20 11:39:23,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:23,317 INFO L481 AbstractCegarLoop]: Abstraction has 52979 states. [2021-01-20 11:39:23,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:23,317 INFO L276 IsEmpty]: Start isEmpty. Operand 52979 states. [2021-01-20 11:39:23,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:39:23,363 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:23,363 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:39:23,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:23,565 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:23,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1062011773, now seen corresponding path program 54 times [2021-01-20 11:39:23,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:23,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883739438] [2021-01-20 11:39:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:24,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883739438] [2021-01-20 11:39:24,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208869155] [2021-01-20 11:39:24,074 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:24,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 11:39:24,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:39:24,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 11:39:24,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:24,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:24,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:24,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-01-20 11:39:24,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191072392] [2021-01-20 11:39:24,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:39:24,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:24,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:39:24,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:39:24,545 INFO L87 Difference]: Start difference. First operand 52979 states. 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) [2021-01-20 11:39:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:27,208 INFO L93 Difference]: Finished difference Result 53561 states and 118100 transitions. [2021-01-20 11:39:27,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-20 11:39:27,210 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 [2021-01-20 11:39:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:27,345 INFO L225 Difference]: With dead ends: 53561 [2021-01-20 11:39:27,346 INFO L226 Difference]: Without dead ends: 53409 [2021-01-20 11:39:27,346 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=448, Invalid=1714, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:39:27,346 INFO L78 Accepts]: Start accepts. Automaton has 53409 states. Word has length 58 [2021-01-20 11:39:27,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:27,346 INFO L481 AbstractCegarLoop]: Abstraction has 53409 states. [2021-01-20 11:39:27,347 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) [2021-01-20 11:39:27,347 INFO L276 IsEmpty]: Start isEmpty. Operand 53409 states. [2021-01-20 11:39:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:39:27,400 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:27,400 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:39:27,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-20 11:39:27,616 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:27,617 INFO L82 PathProgramCache]: Analyzing trace with hash 351278535, now seen corresponding path program 55 times [2021-01-20 11:39:27,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:27,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257969428] [2021-01-20 11:39:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:27,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257969428] [2021-01-20 11:39:27,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24909167] [2021-01-20 11:39:27,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:28,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:39:28,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:28,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:39:28,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:39:28,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:39:28,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:28,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:28,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:39:28,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956681077] [2021-01-20 11:39:28,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:39:28,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:28,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:39:28,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:39:28,752 INFO L87 Difference]: Start difference. First operand 53409 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:34,981 INFO L93 Difference]: Finished difference Result 55979 states and 123733 transitions. [2021-01-20 11:39:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-20 11:39:34,983 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:39:34,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:35,070 INFO L225 Difference]: With dead ends: 55979 [2021-01-20 11:39:35,070 INFO L226 Difference]: Without dead ends: 55439 [2021-01-20 11:39:35,071 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1862 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1196, Invalid=4206, Unknown=0, NotChecked=0, Total=5402 [2021-01-20 11:39:35,071 INFO L78 Accepts]: Start accepts. Automaton has 55439 states. Word has length 58 [2021-01-20 11:39:35,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:35,071 INFO L481 AbstractCegarLoop]: Abstraction has 55439 states. [2021-01-20 11:39:35,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 55439 states. [2021-01-20 11:39:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:39:35,115 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:35,115 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:39:35,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:35,332 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:35,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:35,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1076500623, now seen corresponding path program 56 times [2021-01-20 11:39:35,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:35,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004553845] [2021-01-20 11:39:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:35,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004553845] [2021-01-20 11:39:35,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540077148] [2021-01-20 11:39:35,694 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 [2021-01-20 11:39:35,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:39:35,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:39:35,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:39:35,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:36,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:36,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:36,305 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:36,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:36,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:39:36,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502776298] [2021-01-20 11:39:36,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:39:36,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:36,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:39:36,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:39:36,308 INFO L87 Difference]: Start difference. First operand 55439 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:36,865 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 14 [2021-01-20 11:39:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:41,658 INFO L93 Difference]: Finished difference Result 58715 states and 129969 transitions. [2021-01-20 11:39:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-20 11:39:41,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:39:41,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:41,775 INFO L225 Difference]: With dead ends: 58715 [2021-01-20 11:39:41,776 INFO L226 Difference]: Without dead ends: 57899 [2021-01-20 11:39:41,777 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1140, Invalid=4262, Unknown=0, NotChecked=0, Total=5402 [2021-01-20 11:39:41,777 INFO L78 Accepts]: Start accepts. Automaton has 57899 states. Word has length 58 [2021-01-20 11:39:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:41,777 INFO L481 AbstractCegarLoop]: Abstraction has 57899 states. [2021-01-20 11:39:41,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 57899 states. [2021-01-20 11:39:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:39:41,828 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:41,828 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:39:42,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:42,029 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:42,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1199870619, now seen corresponding path program 57 times [2021-01-20 11:39:42,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:42,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079213479] [2021-01-20 11:39:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:42,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079213479] [2021-01-20 11:39:42,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108891539] [2021-01-20 11:39:42,388 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 [2021-01-20 11:39:42,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:39:42,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:39:42,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:39:42,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:42,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:39:42,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:43,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:43,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:39:43,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674945894] [2021-01-20 11:39:43,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:39:43,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:43,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:39:43,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:39:43,066 INFO L87 Difference]: Start difference. First operand 57899 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:47,936 INFO L93 Difference]: Finished difference Result 60319 states and 133363 transitions. [2021-01-20 11:39:47,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-20 11:39:47,937 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:39:47,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:48,058 INFO L225 Difference]: With dead ends: 60319 [2021-01-20 11:39:48,059 INFO L226 Difference]: Without dead ends: 59779 [2021-01-20 11:39:48,059 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=919, Invalid=3773, Unknown=0, NotChecked=0, Total=4692 [2021-01-20 11:39:48,059 INFO L78 Accepts]: Start accepts. Automaton has 59779 states. Word has length 58 [2021-01-20 11:39:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:48,060 INFO L481 AbstractCegarLoop]: Abstraction has 59779 states. [2021-01-20 11:39:48,060 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) [2021-01-20 11:39:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 59779 states. [2021-01-20 11:39:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:39:48,125 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:48,125 INFO L504 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] [2021-01-20 11:39:48,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-20 11:39:48,327 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:48,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:48,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1328960564, now seen corresponding path program 58 times [2021-01-20 11:39:48,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:48,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684723307] [2021-01-20 11:39:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:48,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684723307] [2021-01-20 11:39:48,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408329583] [2021-01-20 11:39:48,740 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 [2021-01-20 11:39:48,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:39:48,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:39:48,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:39:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:49,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:49,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:49,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:39:49,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969838000] [2021-01-20 11:39:49,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:39:49,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:49,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:39:49,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:39:49,383 INFO L87 Difference]: Start difference. First operand 59779 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:50,343 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-01-20 11:39:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:50,903 INFO L93 Difference]: Finished difference Result 60051 states and 132505 transitions. [2021-01-20 11:39:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:39:50,905 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:39:50,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:50,996 INFO L225 Difference]: With dead ends: 60051 [2021-01-20 11:39:50,997 INFO L226 Difference]: Without dead ends: 59899 [2021-01-20 11:39:50,997 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 11:39:50,997 INFO L78 Accepts]: Start accepts. Automaton has 59899 states. Word has length 63 [2021-01-20 11:39:50,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:50,997 INFO L481 AbstractCegarLoop]: Abstraction has 59899 states. [2021-01-20 11:39:50,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 59899 states. [2021-01-20 11:39:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:39:51,045 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:51,045 INFO L504 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] [2021-01-20 11:39:51,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:51,246 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:51,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:51,246 INFO L82 PathProgramCache]: Analyzing trace with hash 137016664, now seen corresponding path program 59 times [2021-01-20 11:39:51,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:51,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328136636] [2021-01-20 11:39:51,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:51,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328136636] [2021-01-20 11:39:51,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985613219] [2021-01-20 11:39:51,619 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 [2021-01-20 11:39:51,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:39:51,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:39:51,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:39:51,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:52,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:52,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:52,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:39:52,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151774621] [2021-01-20 11:39:52,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:39:52,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:52,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:39:52,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:39:52,494 INFO L87 Difference]: Start difference. First operand 59899 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:53,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:53,943 INFO L93 Difference]: Finished difference Result 60171 states and 132745 transitions. [2021-01-20 11:39:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 11:39:53,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:39:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:54,070 INFO L225 Difference]: With dead ends: 60171 [2021-01-20 11:39:54,070 INFO L226 Difference]: Without dead ends: 60019 [2021-01-20 11:39:54,071 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:39:54,071 INFO L78 Accepts]: Start accepts. Automaton has 60019 states. Word has length 63 [2021-01-20 11:39:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:54,071 INFO L481 AbstractCegarLoop]: Abstraction has 60019 states. [2021-01-20 11:39:54,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 60019 states. [2021-01-20 11:39:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:39:54,139 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:54,139 INFO L504 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] [2021-01-20 11:39:54,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-01-20 11:39:54,340 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:54,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:54,341 INFO L82 PathProgramCache]: Analyzing trace with hash 835756714, now seen corresponding path program 60 times [2021-01-20 11:39:54,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:54,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644364208] [2021-01-20 11:39:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:55,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644364208] [2021-01-20 11:39:55,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832921661] [2021-01-20 11:39:55,037 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 [2021-01-20 11:39:55,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 11:39:55,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:39:55,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:39:55,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:55,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:55,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:55,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:39:55,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766434592] [2021-01-20 11:39:55,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:39:55,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:55,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:39:55,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:39:55,773 INFO L87 Difference]: Start difference. First operand 60019 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:57,786 INFO L93 Difference]: Finished difference Result 60291 states and 132985 transitions. [2021-01-20 11:39:57,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 11:39:57,788 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:39:57,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:57,909 INFO L225 Difference]: With dead ends: 60291 [2021-01-20 11:39:57,909 INFO L226 Difference]: Without dead ends: 60139 [2021-01-20 11:39:57,910 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:39:57,910 INFO L78 Accepts]: Start accepts. Automaton has 60139 states. Word has length 63 [2021-01-20 11:39:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:57,911 INFO L481 AbstractCegarLoop]: Abstraction has 60139 states. [2021-01-20 11:39:57,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 60139 states. [2021-01-20 11:39:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:39:58,014 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:58,014 INFO L504 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] [2021-01-20 11:39:58,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-20 11:39:58,227 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:58,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1527590466, now seen corresponding path program 61 times [2021-01-20 11:39:58,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:58,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185842916] [2021-01-20 11:39:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:58,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185842916] [2021-01-20 11:39:58,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044710362] [2021-01-20 11:39:58,627 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 [2021-01-20 11:39:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:58,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:39:58,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:59,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:59,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:59,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:39:59,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374002979] [2021-01-20 11:39:59,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:39:59,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:59,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:39:59,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:39:59,858 INFO L87 Difference]: Start difference. First operand 60139 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:02,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:02,057 INFO L93 Difference]: Finished difference Result 60411 states and 133225 transitions. [2021-01-20 11:40:02,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 11:40:02,059 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:02,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:02,216 INFO L225 Difference]: With dead ends: 60411 [2021-01-20 11:40:02,216 INFO L226 Difference]: Without dead ends: 60259 [2021-01-20 11:40:02,217 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=337, Invalid=923, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 11:40:02,217 INFO L78 Accepts]: Start accepts. Automaton has 60259 states. Word has length 63 [2021-01-20 11:40:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:02,217 INFO L481 AbstractCegarLoop]: Abstraction has 60259 states. [2021-01-20 11:40:02,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:02,218 INFO L276 IsEmpty]: Start isEmpty. Operand 60259 states. [2021-01-20 11:40:02,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:02,308 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:02,309 INFO L504 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] [2021-01-20 11:40:02,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-20 11:40:02,523 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:02,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:02,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1877853004, now seen corresponding path program 62 times [2021-01-20 11:40:02,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:02,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865174208] [2021-01-20 11:40:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:02,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865174208] [2021-01-20 11:40:02,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677970699] [2021-01-20 11:40:02,911 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 [2021-01-20 11:40:02,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:40:02,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:02,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:02,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:03,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:03,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:03,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:03,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365323093] [2021-01-20 11:40:03,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:03,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:03,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:03,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:03,511 INFO L87 Difference]: Start difference. First operand 60259 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:05,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:05,364 INFO L93 Difference]: Finished difference Result 60651 states and 133705 transitions. [2021-01-20 11:40:05,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:40:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:05,512 INFO L225 Difference]: With dead ends: 60651 [2021-01-20 11:40:05,512 INFO L226 Difference]: Without dead ends: 60499 [2021-01-20 11:40:05,512 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:40:05,512 INFO L78 Accepts]: Start accepts. Automaton has 60499 states. Word has length 63 [2021-01-20 11:40:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:05,513 INFO L481 AbstractCegarLoop]: Abstraction has 60499 states. [2021-01-20 11:40:05,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 60499 states. [2021-01-20 11:40:05,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:05,583 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:05,583 INFO L504 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] [2021-01-20 11:40:05,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:05,799 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:05,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:05,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1718374242, now seen corresponding path program 63 times [2021-01-20 11:40:05,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:05,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594263973] [2021-01-20 11:40:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:06,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594263973] [2021-01-20 11:40:06,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509134557] [2021-01-20 11:40:06,148 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 [2021-01-20 11:40:06,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:40:06,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:06,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:06,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:06,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:06,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:06,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:06,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080962352] [2021-01-20 11:40:06,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:06,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:06,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:06,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:06,662 INFO L87 Difference]: Start difference. First operand 60499 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:08,552 INFO L93 Difference]: Finished difference Result 60771 states and 133945 transitions. [2021-01-20 11:40:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:40:08,554 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:08,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:08,674 INFO L225 Difference]: With dead ends: 60771 [2021-01-20 11:40:08,675 INFO L226 Difference]: Without dead ends: 60619 [2021-01-20 11:40:08,675 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=453, Invalid=1269, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 11:40:08,675 INFO L78 Accepts]: Start accepts. Automaton has 60619 states. Word has length 63 [2021-01-20 11:40:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:08,676 INFO L481 AbstractCegarLoop]: Abstraction has 60619 states. [2021-01-20 11:40:08,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 60619 states. [2021-01-20 11:40:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:08,739 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:08,739 INFO L504 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] [2021-01-20 11:40:08,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:08,940 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash -655006414, now seen corresponding path program 64 times [2021-01-20 11:40:08,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:08,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935212555] [2021-01-20 11:40:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:09,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935212555] [2021-01-20 11:40:09,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627460811] [2021-01-20 11:40:09,558 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 [2021-01-20 11:40:09,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:40:09,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:09,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:09,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:10,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:10,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:10,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:10,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161452419] [2021-01-20 11:40:10,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:10,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:10,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:10,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:10,165 INFO L87 Difference]: Start difference. First operand 60619 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:11,436 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 17 [2021-01-20 11:40:12,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:12,277 INFO L93 Difference]: Finished difference Result 61299 states and 135065 transitions. [2021-01-20 11:40:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 11:40:12,280 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:12,411 INFO L225 Difference]: With dead ends: 61299 [2021-01-20 11:40:12,412 INFO L226 Difference]: Without dead ends: 61059 [2021-01-20 11:40:12,412 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=442, Invalid=1198, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:40:12,412 INFO L78 Accepts]: Start accepts. Automaton has 61059 states. Word has length 63 [2021-01-20 11:40:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:12,412 INFO L481 AbstractCegarLoop]: Abstraction has 61059 states. [2021-01-20 11:40:12,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 61059 states. [2021-01-20 11:40:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:12,477 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:12,477 INFO L504 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] [2021-01-20 11:40:12,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:12,678 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:12,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:12,679 INFO L82 PathProgramCache]: Analyzing trace with hash 98924198, now seen corresponding path program 65 times [2021-01-20 11:40:12,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:12,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761874350] [2021-01-20 11:40:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:13,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761874350] [2021-01-20 11:40:13,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939000054] [2021-01-20 11:40:13,106 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 [2021-01-20 11:40:13,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:40:13,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:13,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:13,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:13,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:13,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:13,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866077254] [2021-01-20 11:40:13,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:13,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:13,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:13,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:13,793 INFO L87 Difference]: Start difference. First operand 61059 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:15,462 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2021-01-20 11:40:15,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:15,911 INFO L93 Difference]: Finished difference Result 61291 states and 134985 transitions. [2021-01-20 11:40:15,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:40:15,914 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:15,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:16,088 INFO L225 Difference]: With dead ends: 61291 [2021-01-20 11:40:16,089 INFO L226 Difference]: Without dead ends: 61139 [2021-01-20 11:40:16,089 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=376, Invalid=1106, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 11:40:16,089 INFO L78 Accepts]: Start accepts. Automaton has 61139 states. Word has length 63 [2021-01-20 11:40:16,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:16,090 INFO L481 AbstractCegarLoop]: Abstraction has 61139 states. [2021-01-20 11:40:16,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 61139 states. [2021-01-20 11:40:16,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:16,201 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:16,203 INFO L504 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] [2021-01-20 11:40:16,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:16,418 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:16,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:16,421 INFO L82 PathProgramCache]: Analyzing trace with hash 797664248, now seen corresponding path program 66 times [2021-01-20 11:40:16,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:16,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313551335] [2021-01-20 11:40:16,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:16,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313551335] [2021-01-20 11:40:16,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370563030] [2021-01-20 11:40:16,891 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 [2021-01-20 11:40:16,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 11:40:16,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:16,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:16,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:17,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:17,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:17,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:17,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617466242] [2021-01-20 11:40:17,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:17,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:17,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:17,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:17,794 INFO L87 Difference]: Start difference. First operand 61139 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:20,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:20,002 INFO L93 Difference]: Finished difference Result 61531 states and 135465 transitions. [2021-01-20 11:40:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:40:20,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:20,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:20,159 INFO L225 Difference]: With dead ends: 61531 [2021-01-20 11:40:20,159 INFO L226 Difference]: Without dead ends: 61379 [2021-01-20 11:40:20,160 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:40:20,160 INFO L78 Accepts]: Start accepts. Automaton has 61379 states. Word has length 63 [2021-01-20 11:40:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:20,160 INFO L481 AbstractCegarLoop]: Abstraction has 61379 states. [2021-01-20 11:40:20,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 61379 states. [2021-01-20 11:40:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:20,235 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:20,235 INFO L504 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] [2021-01-20 11:40:20,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-01-20 11:40:20,450 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:20,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:20,451 INFO L82 PathProgramCache]: Analyzing trace with hash -37642492, now seen corresponding path program 67 times [2021-01-20 11:40:20,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:20,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964000137] [2021-01-20 11:40:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:21,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964000137] [2021-01-20 11:40:21,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002992119] [2021-01-20 11:40:21,027 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 [2021-01-20 11:40:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:21,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:21,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:21,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:21,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:21,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:21,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840627942] [2021-01-20 11:40:21,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:21,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:21,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:21,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:21,681 INFO L87 Difference]: Start difference. First operand 61379 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:23,546 INFO L93 Difference]: Finished difference Result 61611 states and 135625 transitions. [2021-01-20 11:40:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:40:23,548 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:23,668 INFO L225 Difference]: With dead ends: 61611 [2021-01-20 11:40:23,668 INFO L226 Difference]: Without dead ends: 61459 [2021-01-20 11:40:23,669 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:40:23,669 INFO L78 Accepts]: Start accepts. Automaton has 61459 states. Word has length 63 [2021-01-20 11:40:23,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:23,669 INFO L481 AbstractCegarLoop]: Abstraction has 61459 states. [2021-01-20 11:40:23,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:23,669 INFO L276 IsEmpty]: Start isEmpty. Operand 61459 states. [2021-01-20 11:40:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:23,730 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:23,730 INFO L504 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] [2021-01-20 11:40:23,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:23,931 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:23,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:23,932 INFO L82 PathProgramCache]: Analyzing trace with hash 963202520, now seen corresponding path program 68 times [2021-01-20 11:40:23,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:23,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789280581] [2021-01-20 11:40:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:24,245 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-01-20 11:40:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:24,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789280581] [2021-01-20 11:40:24,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603794569] [2021-01-20 11:40:24,438 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 [2021-01-20 11:40:24,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:40:24,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:24,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:24,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:25,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:25,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:25,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:25,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090157719] [2021-01-20 11:40:25,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:25,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:25,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:25,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:25,159 INFO L87 Difference]: Start difference. First operand 61459 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:27,155 INFO L93 Difference]: Finished difference Result 61651 states and 135705 transitions. [2021-01-20 11:40:27,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:40:27,157 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:27,265 INFO L225 Difference]: With dead ends: 61651 [2021-01-20 11:40:27,265 INFO L226 Difference]: Without dead ends: 61499 [2021-01-20 11:40:27,265 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=446, Invalid=1276, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 11:40:27,266 INFO L78 Accepts]: Start accepts. Automaton has 61499 states. Word has length 63 [2021-01-20 11:40:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:27,266 INFO L481 AbstractCegarLoop]: Abstraction has 61499 states. [2021-01-20 11:40:27,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 61499 states. [2021-01-20 11:40:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:27,329 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:27,329 INFO L504 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] [2021-01-20 11:40:27,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:27,531 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:27,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:27,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1661942570, now seen corresponding path program 69 times [2021-01-20 11:40:27,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:27,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896887472] [2021-01-20 11:40:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:27,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896887472] [2021-01-20 11:40:27,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264407742] [2021-01-20 11:40:27,843 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 [2021-01-20 11:40:27,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:40:27,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:27,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:27,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:28,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:28,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:28,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:28,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930997588] [2021-01-20 11:40:28,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:28,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:28,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:28,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:28,511 INFO L87 Difference]: Start difference. First operand 61499 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:31,190 INFO L93 Difference]: Finished difference Result 61931 states and 136265 transitions. [2021-01-20 11:40:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:40:31,192 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:31,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:31,305 INFO L225 Difference]: With dead ends: 61931 [2021-01-20 11:40:31,305 INFO L226 Difference]: Without dead ends: 61779 [2021-01-20 11:40:31,306 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=492, Invalid=1400, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:40:31,306 INFO L78 Accepts]: Start accepts. Automaton has 61779 states. Word has length 63 [2021-01-20 11:40:31,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:31,306 INFO L481 AbstractCegarLoop]: Abstraction has 61779 states. [2021-01-20 11:40:31,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 61779 states. [2021-01-20 11:40:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:31,365 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:31,365 INFO L504 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] [2021-01-20 11:40:31,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:31,567 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:31,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:31,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1197269958, now seen corresponding path program 70 times [2021-01-20 11:40:31,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:31,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920785578] [2021-01-20 11:40:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:31,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920785578] [2021-01-20 11:40:31,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262714556] [2021-01-20 11:40:31,931 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 [2021-01-20 11:40:32,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:40:32,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:32,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:32,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:32,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:32,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:32,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:32,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845229942] [2021-01-20 11:40:32,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:32,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:32,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:32,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:32,570 INFO L87 Difference]: Start difference. First operand 61779 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:33,417 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-01-20 11:40:34,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:34,753 INFO L93 Difference]: Finished difference Result 61971 states and 136345 transitions. [2021-01-20 11:40:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:40:34,754 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:34,835 INFO L225 Difference]: With dead ends: 61971 [2021-01-20 11:40:34,835 INFO L226 Difference]: Without dead ends: 61819 [2021-01-20 11:40:34,836 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=548, Invalid=1522, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:40:34,836 INFO L78 Accepts]: Start accepts. Automaton has 61819 states. Word has length 63 [2021-01-20 11:40:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:34,836 INFO L481 AbstractCegarLoop]: Abstraction has 61819 states. [2021-01-20 11:40:34,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:34,836 INFO L276 IsEmpty]: Start isEmpty. Operand 61819 states. [2021-01-20 11:40:34,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:34,902 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:34,903 INFO L504 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] [2021-01-20 11:40:35,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:35,104 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:35,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:35,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1498479880, now seen corresponding path program 71 times [2021-01-20 11:40:35,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:35,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247120426] [2021-01-20 11:40:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:35,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247120426] [2021-01-20 11:40:35,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527479178] [2021-01-20 11:40:35,789 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 [2021-01-20 11:40:35,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:40:35,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:35,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:35,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:36,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:36,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:36,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:36,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046990189] [2021-01-20 11:40:36,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:36,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:36,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:36,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:36,442 INFO L87 Difference]: Start difference. First operand 61819 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:39,121 INFO L93 Difference]: Finished difference Result 62291 states and 136985 transitions. [2021-01-20 11:40:39,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 11:40:39,123 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:39,247 INFO L225 Difference]: With dead ends: 62291 [2021-01-20 11:40:39,247 INFO L226 Difference]: Without dead ends: 62139 [2021-01-20 11:40:39,248 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=577, Invalid=1585, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:40:39,248 INFO L78 Accepts]: Start accepts. Automaton has 62139 states. Word has length 63 [2021-01-20 11:40:39,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:39,248 INFO L481 AbstractCegarLoop]: Abstraction has 62139 states. [2021-01-20 11:40:39,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:39,249 INFO L276 IsEmpty]: Start isEmpty. Operand 62139 states. [2021-01-20 11:40:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:39,314 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:39,314 INFO L504 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] [2021-01-20 11:40:39,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-01-20 11:40:39,515 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:39,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:39,516 INFO L82 PathProgramCache]: Analyzing trace with hash -315479556, now seen corresponding path program 72 times [2021-01-20 11:40:39,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:39,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417364987] [2021-01-20 11:40:39,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:39,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417364987] [2021-01-20 11:40:39,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288782917] [2021-01-20 11:40:39,889 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 [2021-01-20 11:40:39,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 11:40:39,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:39,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:39,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:40,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:40,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:40,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:40,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718685793] [2021-01-20 11:40:40,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:40,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:40,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:40,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:40,707 INFO L87 Difference]: Start difference. First operand 62139 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:43,112 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-01-20 11:40:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:43,394 INFO L93 Difference]: Finished difference Result 62571 states and 137545 transitions. [2021-01-20 11:40:43,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:40:43,397 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:43,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:43,524 INFO L225 Difference]: With dead ends: 62571 [2021-01-20 11:40:43,524 INFO L226 Difference]: Without dead ends: 62419 [2021-01-20 11:40:43,525 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=544, Invalid=1526, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:40:43,525 INFO L78 Accepts]: Start accepts. Automaton has 62419 states. Word has length 63 [2021-01-20 11:40:43,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:43,525 INFO L481 AbstractCegarLoop]: Abstraction has 62419 states. [2021-01-20 11:40:43,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:43,525 INFO L276 IsEmpty]: Start isEmpty. Operand 62419 states. [2021-01-20 11:40:43,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:43,597 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:43,597 INFO L504 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] [2021-01-20 11:40:43,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-01-20 11:40:43,798 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:43,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:43,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1105471312, now seen corresponding path program 73 times [2021-01-20 11:40:43,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:43,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392556030] [2021-01-20 11:40:43,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:44,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392556030] [2021-01-20 11:40:44,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877553302] [2021-01-20 11:40:44,203 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 [2021-01-20 11:40:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:44,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:44,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:44,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:44,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:44,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:44,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389525357] [2021-01-20 11:40:44,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:44,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:44,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:44,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:44,948 INFO L87 Difference]: Start difference. First operand 62419 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:47,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:47,584 INFO L93 Difference]: Finished difference Result 62731 states and 137865 transitions. [2021-01-20 11:40:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:40:47,586 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:47,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:47,673 INFO L225 Difference]: With dead ends: 62731 [2021-01-20 11:40:47,673 INFO L226 Difference]: Without dead ends: 62579 [2021-01-20 11:40:47,673 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=476, Invalid=1330, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:40:47,673 INFO L78 Accepts]: Start accepts. Automaton has 62579 states. Word has length 63 [2021-01-20 11:40:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:47,673 INFO L481 AbstractCegarLoop]: Abstraction has 62579 states. [2021-01-20 11:40:47,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 62579 states. [2021-01-20 11:40:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:47,740 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:47,740 INFO L504 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] [2021-01-20 11:40:47,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:47,942 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:47,942 INFO L82 PathProgramCache]: Analyzing trace with hash 770813622, now seen corresponding path program 74 times [2021-01-20 11:40:47,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:47,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799706039] [2021-01-20 11:40:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:48,155 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2021-01-20 11:40:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:48,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799706039] [2021-01-20 11:40:48,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853880256] [2021-01-20 11:40:48,343 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 [2021-01-20 11:40:48,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:40:48,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:48,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:48,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:49,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:49,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:49,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:49,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588234522] [2021-01-20 11:40:49,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:49,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:49,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:49,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:49,072 INFO L87 Difference]: Start difference. First operand 62579 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:51,262 INFO L93 Difference]: Finished difference Result 62811 states and 138025 transitions. [2021-01-20 11:40:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:40:51,265 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:51,350 INFO L225 Difference]: With dead ends: 62811 [2021-01-20 11:40:51,350 INFO L226 Difference]: Without dead ends: 62659 [2021-01-20 11:40:51,350 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:40:51,350 INFO L78 Accepts]: Start accepts. Automaton has 62659 states. Word has length 63 [2021-01-20 11:40:51,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:51,351 INFO L481 AbstractCegarLoop]: Abstraction has 62659 states. [2021-01-20 11:40:51,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:51,351 INFO L276 IsEmpty]: Start isEmpty. Operand 62659 states. [2021-01-20 11:40:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:51,398 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:51,399 INFO L504 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] [2021-01-20 11:40:51,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:51,599 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:51,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1004881060, now seen corresponding path program 75 times [2021-01-20 11:40:51,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:51,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017386750] [2021-01-20 11:40:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:51,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017386750] [2021-01-20 11:40:51,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122707673] [2021-01-20 11:40:51,894 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 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 [2021-01-20 11:40:51,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:40:51,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:51,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:51,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:52,612 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:52,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:52,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:52,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189731902] [2021-01-20 11:40:52,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:52,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:52,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:52,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:52,629 INFO L87 Difference]: Start difference. First operand 62659 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:53,328 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-01-20 11:40:55,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:55,186 INFO L93 Difference]: Finished difference Result 62891 states and 138185 transitions. [2021-01-20 11:40:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:40:55,189 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:55,316 INFO L225 Difference]: With dead ends: 62891 [2021-01-20 11:40:55,317 INFO L226 Difference]: Without dead ends: 62739 [2021-01-20 11:40:55,317 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=399, Invalid=1161, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:40:55,317 INFO L78 Accepts]: Start accepts. Automaton has 62739 states. Word has length 63 [2021-01-20 11:40:55,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:55,317 INFO L481 AbstractCegarLoop]: Abstraction has 62739 states. [2021-01-20 11:40:55,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:55,318 INFO L276 IsEmpty]: Start isEmpty. Operand 62739 states. [2021-01-20 11:40:55,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:55,388 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:55,388 INFO L504 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] [2021-01-20 11:40:55,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:55,589 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:55,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:55,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1579806440, now seen corresponding path program 76 times [2021-01-20 11:40:55,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:55,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001881433] [2021-01-20 11:40:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:56,062 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2021-01-20 11:40:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:56,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001881433] [2021-01-20 11:40:56,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160581758] [2021-01-20 11:40:56,097 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 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 [2021-01-20 11:40:56,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:40:56,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:56,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:56,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:56,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:56,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425511297] [2021-01-20 11:40:56,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:56,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:56,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:56,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:56,633 INFO L87 Difference]: Start difference. First operand 62739 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:58,121 INFO L93 Difference]: Finished difference Result 62931 states and 138265 transitions. [2021-01-20 11:40:58,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:40:58,122 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:58,429 INFO L225 Difference]: With dead ends: 62931 [2021-01-20 11:40:58,429 INFO L226 Difference]: Without dead ends: 62779 [2021-01-20 11:40:58,430 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=350, Invalid=1056, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:40:58,430 INFO L78 Accepts]: Start accepts. Automaton has 62779 states. Word has length 63 [2021-01-20 11:40:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:58,430 INFO L481 AbstractCegarLoop]: Abstraction has 62779 states. [2021-01-20 11:40:58,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 62779 states. [2021-01-20 11:40:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:58,488 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:58,488 INFO L504 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] [2021-01-20 11:40:58,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:58,689 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:58,690 INFO L82 PathProgramCache]: Analyzing trace with hash 645386182, now seen corresponding path program 77 times [2021-01-20 11:40:58,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:58,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930118257] [2021-01-20 11:40:58,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:59,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930118257] [2021-01-20 11:40:59,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591935133] [2021-01-20 11:40:59,063 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 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 [2021-01-20 11:40:59,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 11:40:59,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:59,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:59,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:59,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:59,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:59,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:59,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868631589] [2021-01-20 11:40:59,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:59,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:59,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:59,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:40:59,759 INFO L87 Difference]: Start difference. First operand 62779 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:01,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:01,647 INFO L93 Difference]: Finished difference Result 62971 states and 138345 transitions. [2021-01-20 11:41:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:41:01,649 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:01,771 INFO L225 Difference]: With dead ends: 62971 [2021-01-20 11:41:01,772 INFO L226 Difference]: Without dead ends: 62819 [2021-01-20 11:41:01,772 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:41:01,772 INFO L78 Accepts]: Start accepts. Automaton has 62819 states. Word has length 63 [2021-01-20 11:41:01,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:01,772 INFO L481 AbstractCegarLoop]: Abstraction has 62819 states. [2021-01-20 11:41:01,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 62819 states. [2021-01-20 11:41:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:01,850 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:01,850 INFO L504 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] [2021-01-20 11:41:02,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:02,052 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:02,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:02,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2111363410, now seen corresponding path program 78 times [2021-01-20 11:41:02,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:02,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972120958] [2021-01-20 11:41:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:02,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972120958] [2021-01-20 11:41:02,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316856502] [2021-01-20 11:41:02,382 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 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 [2021-01-20 11:41:02,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:41:02,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:02,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:02,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:02,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:02,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:02,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496084843] [2021-01-20 11:41:02,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:02,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:02,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:02,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:02,982 INFO L87 Difference]: Start difference. First operand 62819 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:05,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:05,053 INFO L93 Difference]: Finished difference Result 63091 states and 138585 transitions. [2021-01-20 11:41:05,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:41:05,055 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:05,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:05,150 INFO L225 Difference]: With dead ends: 63091 [2021-01-20 11:41:05,151 INFO L226 Difference]: Without dead ends: 62939 [2021-01-20 11:41:05,151 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=439, Invalid=1283, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 11:41:05,151 INFO L78 Accepts]: Start accepts. Automaton has 62939 states. Word has length 63 [2021-01-20 11:41:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:05,151 INFO L481 AbstractCegarLoop]: Abstraction has 62939 states. [2021-01-20 11:41:05,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:05,151 INFO L276 IsEmpty]: Start isEmpty. Operand 62939 states. [2021-01-20 11:41:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:05,205 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:05,205 INFO L504 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] [2021-01-20 11:41:05,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:05,407 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:05,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1484863836, now seen corresponding path program 79 times [2021-01-20 11:41:05,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:05,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688141570] [2021-01-20 11:41:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:05,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688141570] [2021-01-20 11:41:05,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955541356] [2021-01-20 11:41:05,897 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 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 [2021-01-20 11:41:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:05,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:05,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:06,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:06,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:06,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:06,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130924974] [2021-01-20 11:41:06,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:06,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:06,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:06,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:06,517 INFO L87 Difference]: Start difference. First operand 62939 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:08,503 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-01-20 11:41:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:08,835 INFO L93 Difference]: Finished difference Result 63291 states and 138985 transitions. [2021-01-20 11:41:08,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 11:41:08,837 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:08,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:08,928 INFO L225 Difference]: With dead ends: 63291 [2021-01-20 11:41:08,929 INFO L226 Difference]: Without dead ends: 63139 [2021-01-20 11:41:08,929 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=502, Invalid=1390, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:41:08,929 INFO L78 Accepts]: Start accepts. Automaton has 63139 states. Word has length 63 [2021-01-20 11:41:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:08,929 INFO L481 AbstractCegarLoop]: Abstraction has 63139 states. [2021-01-20 11:41:08,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 63139 states. [2021-01-20 11:41:08,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:08,978 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:08,978 INFO L504 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] [2021-01-20 11:41:09,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:09,179 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:09,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:09,179 INFO L82 PathProgramCache]: Analyzing trace with hash 446756280, now seen corresponding path program 80 times [2021-01-20 11:41:09,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:09,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71676995] [2021-01-20 11:41:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:09,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71676995] [2021-01-20 11:41:09,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357491016] [2021-01-20 11:41:09,484 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 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 [2021-01-20 11:41:09,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:41:09,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:09,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:09,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:10,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:10,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:10,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:10,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922215577] [2021-01-20 11:41:10,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:10,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:10,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:10,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:10,072 INFO L87 Difference]: Start difference. First operand 63139 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:12,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:12,051 INFO L93 Difference]: Finished difference Result 63411 states and 139225 transitions. [2021-01-20 11:41:12,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:41:12,052 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:12,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:12,137 INFO L225 Difference]: With dead ends: 63411 [2021-01-20 11:41:12,137 INFO L226 Difference]: Without dead ends: 63259 [2021-01-20 11:41:12,138 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:41:12,138 INFO L78 Accepts]: Start accepts. Automaton has 63259 states. Word has length 63 [2021-01-20 11:41:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:12,138 INFO L481 AbstractCegarLoop]: Abstraction has 63259 states. [2021-01-20 11:41:12,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 63259 states. [2021-01-20 11:41:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:12,188 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:12,188 INFO L504 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] [2021-01-20 11:41:12,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-01-20 11:41:12,393 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:12,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:12,393 INFO L82 PathProgramCache]: Analyzing trace with hash -442767546, now seen corresponding path program 81 times [2021-01-20 11:41:12,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:12,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503171457] [2021-01-20 11:41:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:12,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503171457] [2021-01-20 11:41:12,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885801985] [2021-01-20 11:41:12,724 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 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 [2021-01-20 11:41:12,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:41:12,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:12,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:12,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:13,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:13,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:13,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:13,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018159847] [2021-01-20 11:41:13,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:13,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:13,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:13,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:13,360 INFO L87 Difference]: Start difference. First operand 63259 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:15,672 INFO L93 Difference]: Finished difference Result 63651 states and 139705 transitions. [2021-01-20 11:41:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:41:15,674 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:15,761 INFO L225 Difference]: With dead ends: 63651 [2021-01-20 11:41:15,761 INFO L226 Difference]: Without dead ends: 63499 [2021-01-20 11:41:15,761 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=564, Invalid=1788, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 11:41:15,761 INFO L78 Accepts]: Start accepts. Automaton has 63499 states. Word has length 63 [2021-01-20 11:41:15,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:15,761 INFO L481 AbstractCegarLoop]: Abstraction has 63499 states. [2021-01-20 11:41:15,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 63499 states. [2021-01-20 11:41:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:15,810 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:15,810 INFO L504 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] [2021-01-20 11:41:16,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:16,011 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:16,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:16,011 INFO L82 PathProgramCache]: Analyzing trace with hash 255972504, now seen corresponding path program 82 times [2021-01-20 11:41:16,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:16,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964342848] [2021-01-20 11:41:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:16,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964342848] [2021-01-20 11:41:16,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346765887] [2021-01-20 11:41:16,292 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 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 [2021-01-20 11:41:16,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:41:16,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:16,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:16,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:16,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:16,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:16,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:16,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923681911] [2021-01-20 11:41:16,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:16,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:16,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:16,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:16,906 INFO L87 Difference]: Start difference. First operand 63499 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:19,217 INFO L93 Difference]: Finished difference Result 63771 states and 139945 transitions. [2021-01-20 11:41:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 11:41:19,219 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:19,312 INFO L225 Difference]: With dead ends: 63771 [2021-01-20 11:41:19,312 INFO L226 Difference]: Without dead ends: 63619 [2021-01-20 11:41:19,312 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=529, Invalid=1541, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:41:19,312 INFO L78 Accepts]: Start accepts. Automaton has 63619 states. Word has length 63 [2021-01-20 11:41:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:19,312 INFO L481 AbstractCegarLoop]: Abstraction has 63619 states. [2021-01-20 11:41:19,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 63619 states. [2021-01-20 11:41:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:19,365 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:19,365 INFO L504 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] [2021-01-20 11:41:19,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-01-20 11:41:19,566 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:19,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1319340332, now seen corresponding path program 83 times [2021-01-20 11:41:19,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:19,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645184334] [2021-01-20 11:41:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:19,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645184334] [2021-01-20 11:41:19,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601329340] [2021-01-20 11:41:19,843 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 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 [2021-01-20 11:41:19,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 11:41:19,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:19,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:20,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:20,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:20,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:20,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342919285] [2021-01-20 11:41:20,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:20,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:20,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:20,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:20,421 INFO L87 Difference]: Start difference. First operand 63619 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:23,394 INFO L93 Difference]: Finished difference Result 64219 states and 140905 transitions. [2021-01-20 11:41:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:41:23,396 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:23,527 INFO L225 Difference]: With dead ends: 64219 [2021-01-20 11:41:23,527 INFO L226 Difference]: Without dead ends: 63979 [2021-01-20 11:41:23,528 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=595, Invalid=1661, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:41:23,528 INFO L78 Accepts]: Start accepts. Automaton has 63979 states. Word has length 63 [2021-01-20 11:41:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:23,528 INFO L481 AbstractCegarLoop]: Abstraction has 63979 states. [2021-01-20 11:41:23,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:23,529 INFO L276 IsEmpty]: Start isEmpty. Operand 63979 states. [2021-01-20 11:41:23,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:23,802 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:23,802 INFO L504 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] [2021-01-20 11:41:24,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:24,017 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:24,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2073270944, now seen corresponding path program 84 times [2021-01-20 11:41:24,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:24,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846682851] [2021-01-20 11:41:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:24,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846682851] [2021-01-20 11:41:24,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691508806] [2021-01-20 11:41:24,377 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 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 [2021-01-20 11:41:24,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:41:24,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:24,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:24,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:25,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:25,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:25,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:25,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876752144] [2021-01-20 11:41:25,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:25,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:25,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:25,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:25,424 INFO L87 Difference]: Start difference. First operand 63979 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:28,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:28,123 INFO L93 Difference]: Finished difference Result 64211 states and 140825 transitions. [2021-01-20 11:41:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:41:28,125 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:28,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:28,239 INFO L225 Difference]: With dead ends: 64211 [2021-01-20 11:41:28,239 INFO L226 Difference]: Without dead ends: 64059 [2021-01-20 11:41:28,240 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:41:28,240 INFO L78 Accepts]: Start accepts. Automaton has 64059 states. Word has length 63 [2021-01-20 11:41:28,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:28,240 INFO L481 AbstractCegarLoop]: Abstraction has 64059 states. [2021-01-20 11:41:28,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 64059 states. [2021-01-20 11:41:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:28,306 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:28,308 INFO L504 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] [2021-01-20 11:41:28,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-01-20 11:41:28,523 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1522956302, now seen corresponding path program 85 times [2021-01-20 11:41:28,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:28,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319417231] [2021-01-20 11:41:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:28,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319417231] [2021-01-20 11:41:28,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053714433] [2021-01-20 11:41:28,862 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 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 [2021-01-20 11:41:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:28,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:28,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:29,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:29,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:29,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:29,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655722422] [2021-01-20 11:41:29,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:29,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:29,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:29,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:29,420 INFO L87 Difference]: Start difference. First operand 64059 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:32,497 INFO L93 Difference]: Finished difference Result 64291 states and 140985 transitions. [2021-01-20 11:41:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 11:41:32,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:32,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:32,622 INFO L225 Difference]: With dead ends: 64291 [2021-01-20 11:41:32,622 INFO L226 Difference]: Without dead ends: 64139 [2021-01-20 11:41:32,622 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=546, Invalid=1710, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:41:32,622 INFO L78 Accepts]: Start accepts. Automaton has 64139 states. Word has length 63 [2021-01-20 11:41:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:32,623 INFO L481 AbstractCegarLoop]: Abstraction has 64139 states. [2021-01-20 11:41:32,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 64139 states. [2021-01-20 11:41:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:32,693 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:32,693 INFO L504 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] [2021-01-20 11:41:32,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-01-20 11:41:32,907 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:32,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1936704254, now seen corresponding path program 86 times [2021-01-20 11:41:32,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:32,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382437779] [2021-01-20 11:41:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:33,430 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2021-01-20 11:41:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:33,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382437779] [2021-01-20 11:41:33,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123589102] [2021-01-20 11:41:33,466 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 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 [2021-01-20 11:41:33,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:41:33,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:33,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:33,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:34,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:34,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:34,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:34,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303799264] [2021-01-20 11:41:34,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:34,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:34,187 INFO L87 Difference]: Start difference. First operand 64139 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:36,112 INFO L93 Difference]: Finished difference Result 64371 states and 141145 transitions. [2021-01-20 11:41:36,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:41:36,115 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:36,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:36,233 INFO L225 Difference]: With dead ends: 64371 [2021-01-20 11:41:36,233 INFO L226 Difference]: Without dead ends: 64219 [2021-01-20 11:41:36,234 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 11:41:36,234 INFO L78 Accepts]: Start accepts. Automaton has 64219 states. Word has length 63 [2021-01-20 11:41:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:36,234 INFO L481 AbstractCegarLoop]: Abstraction has 64219 states. [2021-01-20 11:41:36,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 64219 states. [2021-01-20 11:41:36,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:36,284 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:36,284 INFO L504 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] [2021-01-20 11:41:36,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-01-20 11:41:36,485 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:36,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:36,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1907380212, now seen corresponding path program 87 times [2021-01-20 11:41:36,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:36,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956479484] [2021-01-20 11:41:36,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:36,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956479484] [2021-01-20 11:41:36,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015299978] [2021-01-20 11:41:36,795 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 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 [2021-01-20 11:41:36,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:41:36,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:36,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:36,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:37,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:37,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:37,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:37,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262723616] [2021-01-20 11:41:37,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:37,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:37,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:37,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:37,425 INFO L87 Difference]: Start difference. First operand 64219 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:39,278 INFO L93 Difference]: Finished difference Result 64611 states and 141625 transitions. [2021-01-20 11:41:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:41:39,280 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:39,403 INFO L225 Difference]: With dead ends: 64611 [2021-01-20 11:41:39,403 INFO L226 Difference]: Without dead ends: 64459 [2021-01-20 11:41:39,404 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=370, Invalid=1036, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:41:39,404 INFO L78 Accepts]: Start accepts. Automaton has 64459 states. Word has length 63 [2021-01-20 11:41:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:39,404 INFO L481 AbstractCegarLoop]: Abstraction has 64459 states. [2021-01-20 11:41:39,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 64459 states. [2021-01-20 11:41:39,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:39,475 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:39,475 INFO L504 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] [2021-01-20 11:41:39,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:39,688 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:39,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:39,689 INFO L82 PathProgramCache]: Analyzing trace with hash -441402984, now seen corresponding path program 88 times [2021-01-20 11:41:39,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:39,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368587513] [2021-01-20 11:41:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:40,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368587513] [2021-01-20 11:41:40,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526154373] [2021-01-20 11:41:40,050 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 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 [2021-01-20 11:41:40,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:41:40,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:40,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:40,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:40,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:40,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:40,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760319563] [2021-01-20 11:41:40,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:40,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:40,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:40,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:40,783 INFO L87 Difference]: Start difference. First operand 64459 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:43,198 INFO L93 Difference]: Finished difference Result 64731 states and 141865 transitions. [2021-01-20 11:41:43,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 11:41:43,200 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:43,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:43,327 INFO L225 Difference]: With dead ends: 64731 [2021-01-20 11:41:43,327 INFO L226 Difference]: Without dead ends: 64579 [2021-01-20 11:41:43,328 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=447, Invalid=1359, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:41:43,328 INFO L78 Accepts]: Start accepts. Automaton has 64579 states. Word has length 63 [2021-01-20 11:41:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:43,328 INFO L481 AbstractCegarLoop]: Abstraction has 64579 states. [2021-01-20 11:41:43,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 64579 states. [2021-01-20 11:41:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:43,404 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:43,405 INFO L504 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] [2021-01-20 11:41:43,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-01-20 11:41:43,617 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:43,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:43,618 INFO L82 PathProgramCache]: Analyzing trace with hash 257337066, now seen corresponding path program 89 times [2021-01-20 11:41:43,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:43,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720136248] [2021-01-20 11:41:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:44,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720136248] [2021-01-20 11:41:44,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230155412] [2021-01-20 11:41:44,058 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 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 [2021-01-20 11:41:44,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 11:41:44,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:44,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:44,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:44,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:44,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:44,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:44,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572206176] [2021-01-20 11:41:44,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:44,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:44,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:44,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:44,953 INFO L87 Difference]: Start difference. First operand 64579 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:48,200 INFO L93 Difference]: Finished difference Result 64931 states and 142265 transitions. [2021-01-20 11:41:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:41:48,204 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:48,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:48,358 INFO L225 Difference]: With dead ends: 64931 [2021-01-20 11:41:48,358 INFO L226 Difference]: Without dead ends: 64779 [2021-01-20 11:41:48,358 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=510, Invalid=1470, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 11:41:48,359 INFO L78 Accepts]: Start accepts. Automaton has 64779 states. Word has length 63 [2021-01-20 11:41:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:48,359 INFO L481 AbstractCegarLoop]: Abstraction has 64779 states. [2021-01-20 11:41:48,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 64779 states. [2021-01-20 11:41:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:48,458 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:48,458 INFO L504 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] [2021-01-20 11:41:48,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:48,672 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:48,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:48,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2106010114, now seen corresponding path program 90 times [2021-01-20 11:41:48,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:48,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421204139] [2021-01-20 11:41:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:49,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421204139] [2021-01-20 11:41:49,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498060783] [2021-01-20 11:41:49,096 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 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 [2021-01-20 11:41:49,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:41:49,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:49,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:49,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:49,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:49,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:49,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:49,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377293103] [2021-01-20 11:41:49,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:49,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:49,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:49,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:49,943 INFO L87 Difference]: Start difference. First operand 64779 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:52,389 INFO L93 Difference]: Finished difference Result 65051 states and 142505 transitions. [2021-01-20 11:41:52,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:41:52,392 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:52,511 INFO L225 Difference]: With dead ends: 65051 [2021-01-20 11:41:52,512 INFO L226 Difference]: Without dead ends: 64899 [2021-01-20 11:41:52,512 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=410, Invalid=1230, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:41:52,512 INFO L78 Accepts]: Start accepts. Automaton has 64899 states. Word has length 63 [2021-01-20 11:41:52,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:52,513 INFO L481 AbstractCegarLoop]: Abstraction has 64899 states. [2021-01-20 11:41:52,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:52,513 INFO L276 IsEmpty]: Start isEmpty. Operand 64899 states. [2021-01-20 11:41:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:52,581 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:52,582 INFO L504 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] [2021-01-20 11:41:52,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-01-20 11:41:52,796 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:52,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:52,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1208861690, now seen corresponding path program 91 times [2021-01-20 11:41:52,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:52,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641964801] [2021-01-20 11:41:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:53,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641964801] [2021-01-20 11:41:53,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429229383] [2021-01-20 11:41:53,095 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 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 [2021-01-20 11:41:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:53,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:53,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:55,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:55,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:55,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:55,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222127874] [2021-01-20 11:41:55,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:55,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:55,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:55,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:55,454 INFO L87 Difference]: Start difference. First operand 64899 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:57,286 INFO L93 Difference]: Finished difference Result 65731 states and 143865 transitions. [2021-01-20 11:41:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 11:41:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:57,376 INFO L225 Difference]: With dead ends: 65731 [2021-01-20 11:41:57,376 INFO L226 Difference]: Without dead ends: 65579 [2021-01-20 11:41:57,376 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=384, Invalid=1098, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 11:41:57,376 INFO L78 Accepts]: Start accepts. Automaton has 65579 states. Word has length 63 [2021-01-20 11:41:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:57,377 INFO L481 AbstractCegarLoop]: Abstraction has 65579 states. [2021-01-20 11:41:57,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 65579 states. [2021-01-20 11:41:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:57,427 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:57,427 INFO L504 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] [2021-01-20 11:41:57,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:57,628 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:57,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1726190928, now seen corresponding path program 92 times [2021-01-20 11:41:57,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:57,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745529964] [2021-01-20 11:41:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:57,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745529964] [2021-01-20 11:41:57,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42008206] [2021-01-20 11:41:57,920 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 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 [2021-01-20 11:41:57,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:41:57,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:57,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:57,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:58,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:58,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:58,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:58,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141616276] [2021-01-20 11:41:58,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:58,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:58,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:41:58,702 INFO L87 Difference]: Start difference. First operand 65579 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:01,465 INFO L93 Difference]: Finished difference Result 66401 states and 145300 transitions. [2021-01-20 11:42:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 11:42:01,467 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:42:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:01,587 INFO L225 Difference]: With dead ends: 66401 [2021-01-20 11:42:01,588 INFO L226 Difference]: Without dead ends: 66249 [2021-01-20 11:42:01,588 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:42:01,588 INFO L78 Accepts]: Start accepts. Automaton has 66249 states. Word has length 63 [2021-01-20 11:42:01,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:01,589 INFO L481 AbstractCegarLoop]: Abstraction has 66249 states. [2021-01-20 11:42:01,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:01,589 INFO L276 IsEmpty]: Start isEmpty. Operand 66249 states. [2021-01-20 11:42:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:42:01,859 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:01,859 INFO L504 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] [2021-01-20 11:42:02,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:02,074 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:02,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1155486060, now seen corresponding path program 93 times [2021-01-20 11:42:02,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:02,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683664450] [2021-01-20 11:42:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:02,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683664450] [2021-01-20 11:42:02,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841644322] [2021-01-20 11:42:02,561 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 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 [2021-01-20 11:42:02,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:42:02,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:02,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:42:02,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:03,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:42:09,598 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 21 [2021-01-20 11:42:09,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:09,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:09,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:42:09,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470101844] [2021-01-20 11:42:09,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:42:09,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:09,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:42:09,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=371, Unknown=2, NotChecked=0, Total=506 [2021-01-20 11:42:09,626 INFO L87 Difference]: Start difference. First operand 66249 states. 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) [2021-01-20 11:42:14,215 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-01-20 11:42:22,682 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 33 [2021-01-20 11:42:26,962 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-01-20 11:43:30,573 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 33 [2021-01-20 11:44:48,281 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 Received shutdown request... [2021-01-20 11:45:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:45:33,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-01-20 11:45:33,258 WARN L546 AbstractCegarLoop]: Verification canceled [2021-01-20 11:45:33,266 WARN L250 ceAbstractionStarter]: Timeout [2021-01-20 11:45:33,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 11:45:33 BasicIcfg [2021-01-20 11:45:33,267 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-20 11:45:33,268 INFO L168 Benchmark]: Toolchain (without parser) took 779150.75 ms. Allocated memory was 302.0 MB in the beginning and 6.6 GB in the end (delta: 6.3 GB). Free memory was 277.3 MB in the beginning and 3.1 GB in the end (delta: -2.8 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. [2021-01-20 11:45:33,268 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 302.0 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-01-20 11:45:33,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 739.13 ms. Allocated memory is still 302.0 MB. Free memory was 277.0 MB in the beginning and 247.9 MB in the end (delta: 29.1 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.0 GB. [2021-01-20 11:45:33,269 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.70 ms. Allocated memory is still 302.0 MB. Free memory was 247.9 MB in the beginning and 246.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-20 11:45:33,270 INFO L168 Benchmark]: Boogie Preprocessor took 32.00 ms. Allocated memory is still 302.0 MB. Free memory was 246.0 MB in the beginning and 244.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-20 11:45:33,270 INFO L168 Benchmark]: RCFGBuilder took 673.02 ms. Allocated memory is still 302.0 MB. Free memory was 244.7 MB in the beginning and 266.3 MB in the end (delta: -21.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.0 GB. [2021-01-20 11:45:33,270 INFO L168 Benchmark]: TraceAbstraction took 777646.59 ms. Allocated memory was 302.0 MB in the beginning and 6.6 GB in the end (delta: 6.3 GB). Free memory was 266.3 MB in the beginning and 3.1 GB in the end (delta: -2.8 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. [2021-01-20 11:45:33,272 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 302.0 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 739.13 ms. Allocated memory is still 302.0 MB. Free memory was 277.0 MB in the beginning and 247.9 MB in the end (delta: 29.1 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 49.70 ms. Allocated memory is still 302.0 MB. Free memory was 247.9 MB in the beginning and 246.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 32.00 ms. Allocated memory is still 302.0 MB. Free memory was 246.0 MB in the beginning and 244.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 673.02 ms. Allocated memory is still 302.0 MB. Free memory was 244.7 MB in the beginning and 266.3 MB in the end (delta: -21.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 777646.59 ms. Allocated memory was 302.0 MB in the beginning and 6.6 GB in the end (delta: 6.3 GB). Free memory was 266.3 MB in the beginning and 3.1 GB in the end (delta: -2.8 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 20). Cancelled while BasicCegarLoop was constructing difference of abstraction (66249states) and FLOYD_HOARE automaton (currently 34 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (4422 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 777.5s, OverallIterations: 111, TraceHistogramMax: 5, AutomataDifference: 659.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 9963 SDtfs, 81556 SDslu, 116910 SDs, 0 SdLazy, 20172 SolverSat, 6409 SolverUnsat, 171 SolverUnknown, 0 SolverNotchecked, 358.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9469 GetRequests, 5155 SyntacticMatches, 45 SemanticMatches, 4269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58052 ImplicationChecksByTransitivity, 323.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66249occurred in iteration=110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 80.1s InterpolantComputationTime, 12145 NumberOfCodeBlocks, 12145 NumberOfCodeBlocksAsserted, 398 NumberOfCheckSat, 11930 ConstructedInterpolants, 9 QuantifiedInterpolants, 5602845 SizeOfPredicates, 422 NumberOfNonLiveVariables, 14432 ConjunctsInSsa, 1360 ConjunctsInUnsatCore, 215 InterpolantComputations, 7 PerfectInterpolantSequences, 0/4490 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