/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-keepdead.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-e5469eb [2021-01-20 17:49:12,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-20 17:49:12,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-20 17:49:12,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-20 17:49:12,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-20 17:49:12,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-20 17:49:12,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-20 17:49:12,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-20 17:49:12,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-20 17:49:12,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-20 17:49:12,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-20 17:49:12,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-20 17:49:12,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-20 17:49:12,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-20 17:49:12,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-20 17:49:12,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-20 17:49:12,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-20 17:49:12,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-20 17:49:12,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-20 17:49:12,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-20 17:49:12,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-20 17:49:12,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-20 17:49:12,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-20 17:49:12,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-20 17:49:12,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-20 17:49:12,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-20 17:49:12,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-20 17:49:12,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-20 17:49:12,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-20 17:49:12,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-20 17:49:12,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-20 17:49:12,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-20 17:49:12,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-20 17:49:12,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-20 17:49:12,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-20 17:49:12,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-20 17:49:12,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-20 17:49:12,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-20 17:49:12,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-20 17:49:12,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-20 17:49:12,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-20 17:49:12,299 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-keepdead.epf [2021-01-20 17:49:12,352 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-20 17:49:12,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-20 17:49:12,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-20 17:49:12,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-20 17:49:12,356 INFO L138 SettingsManager]: * Use SBE=true [2021-01-20 17:49:12,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-20 17:49:12,357 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-20 17:49:12,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-20 17:49:12,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-20 17:49:12,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-20 17:49:12,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-20 17:49:12,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-20 17:49:12,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-20 17:49:12,359 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-20 17:49:12,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-20 17:49:12,360 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-20 17:49:12,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-20 17:49:12,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-20 17:49:12,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-20 17:49:12,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-20 17:49:12,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-20 17:49:12,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 17:49:12,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-20 17:49:12,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-20 17:49:12,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-20 17:49:12,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-20 17:49:12,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-20 17:49:12,362 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-20 17:49:12,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-20 17:49:12,363 INFO L138 SettingsManager]: * Remove dead ends from automaton=false [2021-01-20 17:49:12,363 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-20 17:49:12,363 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-20 17:49:12,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-20 17:49:12,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-20 17:49:12,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-20 17:49:12,840 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-20 17:49:12,841 INFO L275 PluginConnector]: CDTParser initialized [2021-01-20 17:49:12,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-01-20 17:49:12,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee940de14/eddd628c74404ffc9df7855d99395d65/FLAGf253ffa11 [2021-01-20 17:49:13,651 INFO L306 CDTParser]: Found 1 translation units. [2021-01-20 17:49:13,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-01-20 17:49:13,672 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee940de14/eddd628c74404ffc9df7855d99395d65/FLAGf253ffa11 [2021-01-20 17:49:13,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee940de14/eddd628c74404ffc9df7855d99395d65 [2021-01-20 17:49:13,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-20 17:49:13,933 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-20 17:49:13,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-20 17:49:13,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-20 17:49:13,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-20 17:49:13,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 05:49:13" (1/1) ... [2021-01-20 17:49:13,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@649188a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:13, skipping insertion in model container [2021-01-20 17:49:13,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 05:49:13" (1/1) ... [2021-01-20 17:49:13,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-20 17:49:13,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-20 17:49:14,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 17:49:14,492 INFO L203 MainTranslator]: Completed pre-run [2021-01-20 17:49:14,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 17:49:14,709 INFO L208 MainTranslator]: Completed translation [2021-01-20 17:49:14,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14 WrapperNode [2021-01-20 17:49:14,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-20 17:49:14,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-20 17:49:14,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-20 17:49:14,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-20 17:49:14,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-20 17:49:14,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-20 17:49:14,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-20 17:49:14,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-20 17:49:14,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-20 17:49:14,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-20 17:49:14,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-20 17:49:14,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-20 17:49:14,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (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 17:49:14,983 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-20 17:49:14,983 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-20 17:49:14,983 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-20 17:49:14,983 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-20 17:49:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-20 17:49:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-20 17:49:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-20 17:49:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-20 17:49:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-20 17:49:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-20 17:49:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-20 17:49:14,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-20 17:49:14,986 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 17:49:15,374 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-20 17:49:15,374 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-20 17:49:15,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 05:49:15 BoogieIcfgContainer [2021-01-20 17:49:15,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-20 17:49:15,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-20 17:49:15,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-20 17:49:15,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-20 17:49:15,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 05:49:13" (1/3) ... [2021-01-20 17:49:15,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cbe7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 05:49:15, skipping insertion in model container [2021-01-20 17:49:15,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (2/3) ... [2021-01-20 17:49:15,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cbe7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 05:49:15, skipping insertion in model container [2021-01-20 17:49:15,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 05:49:15" (3/3) ... [2021-01-20 17:49:15,384 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2021-01-20 17:49:15,401 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-20 17:49:15,401 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-20 17:49:15,404 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-20 17:49:15,405 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-20 17:49:15,439 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,440 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,440 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,440 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,440 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,441 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,441 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,441 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,441 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,442 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,442 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,442 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,443 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,443 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,443 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,443 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,445 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,445 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,446 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,446 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,446 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,446 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,447 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,447 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,447 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,447 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,448 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,448 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,448 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,448 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,449 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,449 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,449 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,449 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,450 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,450 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,450 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,451 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,455 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,455 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,456 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,456 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,456 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,457 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,457 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,457 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,458 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,458 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,458 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,458 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,459 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,459 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,459 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,459 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,460 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,464 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,470 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,470 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,471 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,471 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,471 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,471 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,489 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,489 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,490 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,490 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,490 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,490 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,500 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-20 17:49:15,515 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-20 17:49:15,555 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-20 17:49:15,555 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-20 17:49:15,555 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-20 17:49:15,555 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-20 17:49:15,556 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-20 17:49:15,557 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-20 17:49:15,557 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-20 17:49:15,557 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-20 17:49:15,578 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2021-01-20 17:49:15,749 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 17:49:15,760 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 17:49:15,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-20 17:49:15,782 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:15,783 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 17:49:15,784 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:15,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:15,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2143390317, now seen corresponding path program 1 times [2021-01-20 17:49:15,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:15,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371063771] [2021-01-20 17:49:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:16,260 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 17:49:16,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371063771] [2021-01-20 17:49:16,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:16,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 17:49:16,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71965707] [2021-01-20 17:49:16,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 17:49:16,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:16,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 17:49:16,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 17:49:16,303 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 17:49:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:16,541 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2021-01-20 17:49:16,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 17:49:16,543 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 17:49:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:16,546 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 17:49:16,547 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 11738 transitions. Word has length 28 [2021-01-20 17:49:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:16,548 INFO L481 AbstractCegarLoop]: Abstraction has 4034 states and 11738 transitions. [2021-01-20 17:49:16,549 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 17:49:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 11738 transitions. [2021-01-20 17:49:16,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 17:49:16,559 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:16,559 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 17:49:16,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-20 17:49:16,560 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:16,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:16,561 INFO L82 PathProgramCache]: Analyzing trace with hash 409143693, now seen corresponding path program 1 times [2021-01-20 17:49:16,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:16,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398241476] [2021-01-20 17:49:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:16,836 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 17:49:16,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398241476] [2021-01-20 17:49:16,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:16,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 17:49:16,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540598964] [2021-01-20 17:49:16,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 17:49:16,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:16,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 17:49:16,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-20 17:49:16,843 INFO L87 Difference]: Start difference. First operand 4034 states and 11738 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:17,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:17,096 INFO L93 Difference]: Finished difference Result 5570 states and 16218 transitions. [2021-01-20 17:49:17,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-20 17:49:17,096 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 17:49:17,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:17,099 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-01-20 17:49:17,099 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 16218 transitions. Word has length 33 [2021-01-20 17:49:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:17,100 INFO L481 AbstractCegarLoop]: Abstraction has 5570 states and 16218 transitions. [2021-01-20 17:49:17,101 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 17:49:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 16218 transitions. [2021-01-20 17:49:17,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 17:49:17,107 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:17,107 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 17:49:17,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-20 17:49:17,108 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:17,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:17,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1822434001, now seen corresponding path program 2 times [2021-01-20 17:49:17,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:17,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516754455] [2021-01-20 17:49:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:17,330 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 17:49:17,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516754455] [2021-01-20 17:49:17,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:17,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 17:49:17,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566823143] [2021-01-20 17:49:17,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 17:49:17,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:17,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 17:49:17,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-20 17:49:17,340 INFO L87 Difference]: Start difference. First operand 5570 states and 16218 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:17,643 INFO L93 Difference]: Finished difference Result 7106 states and 20698 transitions. [2021-01-20 17:49:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 17:49:17,644 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 17:49:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:17,645 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-01-20 17:49:17,645 INFO L78 Accepts]: Start accepts. Automaton has 7106 states and 20698 transitions. Word has length 33 [2021-01-20 17:49:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:17,645 INFO L481 AbstractCegarLoop]: Abstraction has 7106 states and 20698 transitions. [2021-01-20 17:49:17,646 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 17:49:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 7106 states and 20698 transitions. [2021-01-20 17:49:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 17:49:17,650 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:17,650 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 17:49:17,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-20 17:49:17,651 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:17,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:17,651 INFO L82 PathProgramCache]: Analyzing trace with hash 26886563, now seen corresponding path program 1 times [2021-01-20 17:49:17,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:17,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645861516] [2021-01-20 17:49:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:17,856 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 17:49:17,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645861516] [2021-01-20 17:49:17,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:17,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 17:49:17,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622309559] [2021-01-20 17:49:17,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 17:49:17,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:17,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 17:49:17,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-20 17:49:17,860 INFO L87 Difference]: Start difference. First operand 7106 states and 20698 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:18,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:18,084 INFO L93 Difference]: Finished difference Result 9242 states and 26890 transitions. [2021-01-20 17:49:18,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 17:49:18,085 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 17:49:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:18,087 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-01-20 17:49:18,087 INFO L78 Accepts]: Start accepts. Automaton has 9242 states and 26890 transitions. Word has length 33 [2021-01-20 17:49:18,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:18,087 INFO L481 AbstractCegarLoop]: Abstraction has 9242 states and 26890 transitions. [2021-01-20 17:49:18,087 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 17:49:18,088 INFO L276 IsEmpty]: Start isEmpty. Operand 9242 states and 26890 transitions. [2021-01-20 17:49:18,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:18,100 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:18,101 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 17:49:18,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-20 17:49:18,101 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:18,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:18,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1836185505, now seen corresponding path program 1 times [2021-01-20 17:49:18,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:18,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644515878] [2021-01-20 17:49:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:18,228 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 17:49:18,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644515878] [2021-01-20 17:49:18,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:18,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 17:49:18,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467229415] [2021-01-20 17:49:18,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 17:49:18,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:18,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 17:49:18,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-20 17:49:18,230 INFO L87 Difference]: Start difference. First operand 9242 states and 26890 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:18,435 INFO L93 Difference]: Finished difference Result 10010 states and 29130 transitions. [2021-01-20 17:49:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-20 17:49:18,435 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 17:49:18,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:18,436 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:18,436 INFO L78 Accepts]: Start accepts. Automaton has 10010 states and 29130 transitions. Word has length 38 [2021-01-20 17:49:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:18,437 INFO L481 AbstractCegarLoop]: Abstraction has 10010 states and 29130 transitions. [2021-01-20 17:49:18,437 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 17:49:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 10010 states and 29130 transitions. [2021-01-20 17:49:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:18,447 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:18,447 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 17:49:18,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-20 17:49:18,447 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:18,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:18,448 INFO L82 PathProgramCache]: Analyzing trace with hash 703073151, now seen corresponding path program 2 times [2021-01-20 17:49:18,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:18,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222958340] [2021-01-20 17:49:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:18,581 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 17:49:18,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222958340] [2021-01-20 17:49:18,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:18,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 17:49:18,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433990080] [2021-01-20 17:49:18,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 17:49:18,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:18,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 17:49:18,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-20 17:49:18,584 INFO L87 Difference]: Start difference. First operand 10010 states and 29130 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:18,777 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-01-20 17:49:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:18,953 INFO L93 Difference]: Finished difference Result 12826 states and 37322 transitions. [2021-01-20 17:49:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-20 17:49:18,953 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 17:49:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:18,954 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:18,954 INFO L78 Accepts]: Start accepts. Automaton has 12826 states and 37322 transitions. Word has length 38 [2021-01-20 17:49:18,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:18,955 INFO L481 AbstractCegarLoop]: Abstraction has 12826 states and 37322 transitions. [2021-01-20 17:49:18,955 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 17:49:18,955 INFO L276 IsEmpty]: Start isEmpty. Operand 12826 states and 37322 transitions. [2021-01-20 17:49:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:18,964 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:18,965 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 17:49:18,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-20 17:49:18,965 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:18,966 INFO L82 PathProgramCache]: Analyzing trace with hash -127797699, now seen corresponding path program 3 times [2021-01-20 17:49:18,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:18,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762683204] [2021-01-20 17:49:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:19,086 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 17:49:19,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762683204] [2021-01-20 17:49:19,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:19,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 17:49:19,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935449115] [2021-01-20 17:49:19,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 17:49:19,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:19,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 17:49:19,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-20 17:49:19,091 INFO L87 Difference]: Start difference. First operand 12826 states and 37322 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:19,479 INFO L93 Difference]: Finished difference Result 16962 states and 49338 transitions. [2021-01-20 17:49:19,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 17:49:19,479 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 17:49:19,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:19,480 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:19,481 INFO L78 Accepts]: Start accepts. Automaton has 16962 states and 49338 transitions. Word has length 38 [2021-01-20 17:49:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:19,481 INFO L481 AbstractCegarLoop]: Abstraction has 16962 states and 49338 transitions. [2021-01-20 17:49:19,481 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 17:49:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 16962 states and 49338 transitions. [2021-01-20 17:49:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:19,493 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:19,493 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 17:49:19,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-20 17:49:19,494 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:19,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:19,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2059823446, now seen corresponding path program 1 times [2021-01-20 17:49:19,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:19,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141801123] [2021-01-20 17:49:19,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:19,652 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 17:49:19,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141801123] [2021-01-20 17:49:19,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541879788] [2021-01-20 17:49:19,653 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 17:49:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:19,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 17:49:19,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:19,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:19,985 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 17:49:19,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:19,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-01-20 17:49:19,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197827944] [2021-01-20 17:49:19,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 17:49:19,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:19,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 17:49:19,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-20 17:49:19,987 INFO L87 Difference]: Start difference. First operand 16962 states and 49338 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:20,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:20,371 INFO L93 Difference]: Finished difference Result 18626 states and 54202 transitions. [2021-01-20 17:49:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-20 17:49:20,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 17:49:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:20,373 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:49:20,374 INFO L78 Accepts]: Start accepts. Automaton has 18626 states and 54202 transitions. Word has length 38 [2021-01-20 17:49:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:20,375 INFO L481 AbstractCegarLoop]: Abstraction has 18626 states and 54202 transitions. [2021-01-20 17:49:20,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:20,375 INFO L276 IsEmpty]: Start isEmpty. Operand 18626 states and 54202 transitions. [2021-01-20 17:49:20,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:20,385 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:20,385 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 17:49:20,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-20 17:49:20,600 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:20,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:20,601 INFO L82 PathProgramCache]: Analyzing trace with hash -364831632, now seen corresponding path program 2 times [2021-01-20 17:49:20,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:20,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265680980] [2021-01-20 17:49:20,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:20,749 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 17:49:20,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265680980] [2021-01-20 17:49:20,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439972088] [2021-01-20 17:49:20,750 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 17:49:20,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:20,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:20,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 17:49:20,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:20,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:20,902 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 17:49:20,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:20,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-01-20 17:49:20,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148405484] [2021-01-20 17:49:20,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 17:49:20,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:20,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 17:49:20,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-01-20 17:49:20,904 INFO L87 Difference]: Start difference. First operand 18626 states and 54202 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:21,263 INFO L93 Difference]: Finished difference Result 20162 states and 58682 transitions. [2021-01-20 17:49:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 17:49:21,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 17:49:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:21,264 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:21,264 INFO L78 Accepts]: Start accepts. Automaton has 20162 states and 58682 transitions. Word has length 38 [2021-01-20 17:49:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:21,265 INFO L481 AbstractCegarLoop]: Abstraction has 20162 states and 58682 transitions. [2021-01-20 17:49:21,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 20162 states and 58682 transitions. [2021-01-20 17:49:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:21,281 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:21,281 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 17:49:21,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:21,495 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:21,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1048458676, now seen corresponding path program 3 times [2021-01-20 17:49:21,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:21,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419479503] [2021-01-20 17:49:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:21,639 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 17:49:21,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419479503] [2021-01-20 17:49:21,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082195607] [2021-01-20 17:49:21,645 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 17:49:21,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 17:49:21,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:21,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 17:49:21,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:21,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:21,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:21,988 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 17:49:21,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:21,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-01-20 17:49:21,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016572982] [2021-01-20 17:49:21,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 17:49:21,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:21,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 17:49:21,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-01-20 17:49:21,992 INFO L87 Difference]: Start difference. First operand 20162 states and 58682 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:22,416 INFO L93 Difference]: Finished difference Result 21698 states and 63162 transitions. [2021-01-20 17:49:22,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-20 17:49:22,417 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 17:49:22,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:22,418 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-01-20 17:49:22,418 INFO L78 Accepts]: Start accepts. Automaton has 21698 states and 63162 transitions. Word has length 38 [2021-01-20 17:49:22,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:22,419 INFO L481 AbstractCegarLoop]: Abstraction has 21698 states and 63162 transitions. [2021-01-20 17:49:22,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:22,419 INFO L276 IsEmpty]: Start isEmpty. Operand 21698 states and 63162 transitions. [2021-01-20 17:49:22,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:22,437 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:22,437 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 17:49:22,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-20 17:49:22,651 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:22,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:22,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1809094268, now seen corresponding path program 1 times [2021-01-20 17:49:22,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:22,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072997577] [2021-01-20 17:49:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:22,832 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 17:49:22,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072997577] [2021-01-20 17:49:22,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133291521] [2021-01-20 17:49:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:22,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:22,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:23,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:23,037 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 17:49:23,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:23,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:23,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131540441] [2021-01-20 17:49:23,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:23,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:23,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:23,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:23,040 INFO L87 Difference]: Start difference. First operand 21698 states and 63162 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:23,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:23,501 INFO L93 Difference]: Finished difference Result 23490 states and 68410 transitions. [2021-01-20 17:49:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 17:49:23,502 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 17:49:23,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:23,503 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-01-20 17:49:23,503 INFO L78 Accepts]: Start accepts. Automaton has 23490 states and 68410 transitions. Word has length 43 [2021-01-20 17:49:23,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:23,503 INFO L481 AbstractCegarLoop]: Abstraction has 23490 states and 68410 transitions. [2021-01-20 17:49:23,503 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 17:49:23,503 INFO L276 IsEmpty]: Start isEmpty. Operand 23490 states and 68410 transitions. [2021-01-20 17:49:23,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:23,522 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:23,522 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 17:49:23,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:23,736 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:23,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1432941800, now seen corresponding path program 2 times [2021-01-20 17:49:23,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:23,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111343442] [2021-01-20 17:49:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:23,848 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 17:49:23,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111343442] [2021-01-20 17:49:23,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102230444] [2021-01-20 17:49:23,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:23,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:23,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:23,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:23,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:24,024 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:24,034 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 17:49:24,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:24,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:24,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984452241] [2021-01-20 17:49:24,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:24,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:24,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:24,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:24,036 INFO L87 Difference]: Start difference. First operand 23490 states and 68410 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:24,639 INFO L93 Difference]: Finished difference Result 24322 states and 70842 transitions. [2021-01-20 17:49:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 17:49:24,639 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 17:49:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:24,640 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-01-20 17:49:24,640 INFO L78 Accepts]: Start accepts. Automaton has 24322 states and 70842 transitions. Word has length 43 [2021-01-20 17:49:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:24,641 INFO L481 AbstractCegarLoop]: Abstraction has 24322 states and 70842 transitions. [2021-01-20 17:49:24,641 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 17:49:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 24322 states and 70842 transitions. [2021-01-20 17:49:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:24,660 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:24,660 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 17:49:24,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-20 17:49:24,874 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:24,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1083428478, now seen corresponding path program 3 times [2021-01-20 17:49:24,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:24,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966466532] [2021-01-20 17:49:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:25,085 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 17:49:25,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966466532] [2021-01-20 17:49:25,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163661615] [2021-01-20 17:49:25,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:25,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 17:49:25,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:25,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:25,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:25,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:25,283 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 17:49:25,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:25,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:25,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635695255] [2021-01-20 17:49:25,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:25,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:25,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:25,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:25,287 INFO L87 Difference]: Start difference. First operand 24322 states and 70842 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:25,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:25,818 INFO L93 Difference]: Finished difference Result 25986 states and 75706 transitions. [2021-01-20 17:49:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 17:49:25,818 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 17:49:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:25,819 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2021-01-20 17:49:25,819 INFO L78 Accepts]: Start accepts. Automaton has 25986 states and 75706 transitions. Word has length 43 [2021-01-20 17:49:25,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:25,819 INFO L481 AbstractCegarLoop]: Abstraction has 25986 states and 75706 transitions. [2021-01-20 17:49:25,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:25,819 INFO L276 IsEmpty]: Start isEmpty. Operand 25986 states and 75706 transitions. [2021-01-20 17:49:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:25,834 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:25,834 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 17:49:26,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:26,036 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:26,037 INFO L82 PathProgramCache]: Analyzing trace with hash 615590430, now seen corresponding path program 4 times [2021-01-20 17:49:26,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:26,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674496501] [2021-01-20 17:49:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:26,142 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 17:49:26,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674496501] [2021-01-20 17:49:26,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678818974] [2021-01-20 17:49:26,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:26,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:49:26,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:26,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:26,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:26,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:26,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:26,303 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 17:49:26,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:26,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:26,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572008788] [2021-01-20 17:49:26,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:26,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:26,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:26,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:26,308 INFO L87 Difference]: Start difference. First operand 25986 states and 75706 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:26,925 INFO L93 Difference]: Finished difference Result 35378 states and 103034 transitions. [2021-01-20 17:49:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 17:49:26,925 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 17:49:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:26,926 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2021-01-20 17:49:26,926 INFO L78 Accepts]: Start accepts. Automaton has 35378 states and 103034 transitions. Word has length 43 [2021-01-20 17:49:26,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:26,926 INFO L481 AbstractCegarLoop]: Abstraction has 35378 states and 103034 transitions. [2021-01-20 17:49:26,927 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 17:49:26,927 INFO L276 IsEmpty]: Start isEmpty. Operand 35378 states and 103034 transitions. [2021-01-20 17:49:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:26,941 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:26,942 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 17:49:27,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-20 17:49:27,143 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:27,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:27,144 INFO L82 PathProgramCache]: Analyzing trace with hash -215280420, now seen corresponding path program 5 times [2021-01-20 17:49:27,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:27,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595419704] [2021-01-20 17:49:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:27,290 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 17:49:27,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595419704] [2021-01-20 17:49:27,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374605649] [2021-01-20 17:49:27,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:27,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:27,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:27,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:27,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:27,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:27,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:27,466 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 17:49:27,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:27,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-20 17:49:27,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600720479] [2021-01-20 17:49:27,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 17:49:27,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:27,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 17:49:27,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-20 17:49:27,469 INFO L87 Difference]: Start difference. First operand 35378 states and 103034 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:27,881 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 11 [2021-01-20 17:49:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:28,617 INFO L93 Difference]: Finished difference Result 52786 states and 154042 transitions. [2021-01-20 17:49:28,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 17:49:28,618 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 17:49:28,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:28,619 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=467, Invalid=1339, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 17:49:28,620 INFO L78 Accepts]: Start accepts. Automaton has 52786 states and 154042 transitions. Word has length 43 [2021-01-20 17:49:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:28,620 INFO L481 AbstractCegarLoop]: Abstraction has 52786 states and 154042 transitions. [2021-01-20 17:49:28,620 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 17:49:28,620 INFO L276 IsEmpty]: Start isEmpty. Operand 52786 states and 154042 transitions. [2021-01-20 17:49:28,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:28,635 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:28,635 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 17:49:28,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-20 17:49:28,836 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:28,837 INFO L82 PathProgramCache]: Analyzing trace with hash -55830870, now seen corresponding path program 1 times [2021-01-20 17:49:28,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:28,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812973880] [2021-01-20 17:49:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:29,155 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 17:49:29,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812973880] [2021-01-20 17:49:29,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655261813] [2021-01-20 17:49:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:29,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:29,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:29,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:29,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:29,440 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 17:49:29,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:29,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-20 17:49:29,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282052601] [2021-01-20 17:49:29,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 17:49:29,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:29,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 17:49:29,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-01-20 17:49:29,446 INFO L87 Difference]: Start difference. First operand 52786 states and 154042 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:30,457 INFO L93 Difference]: Finished difference Result 64666 states and 188650 transitions. [2021-01-20 17:49:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 17:49:30,458 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 17:49:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:30,459 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 17:49:30,459 INFO L78 Accepts]: Start accepts. Automaton has 64666 states and 188650 transitions. Word has length 43 [2021-01-20 17:49:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:30,460 INFO L481 AbstractCegarLoop]: Abstraction has 64666 states and 188650 transitions. [2021-01-20 17:49:30,460 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 17:49:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand 64666 states and 188650 transitions. [2021-01-20 17:49:30,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:30,486 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:30,486 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 17:49:30,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-20 17:49:30,694 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:30,695 INFO L82 PathProgramCache]: Analyzing trace with hash -773458049, now seen corresponding path program 6 times [2021-01-20 17:49:30,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:30,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384946346] [2021-01-20 17:49:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:31,008 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 17:49:31,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384946346] [2021-01-20 17:49:31,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554987135] [2021-01-20 17:49:31,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:31,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 17:49:31,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:31,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:31,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:31,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:31,268 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 17:49:31,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:31,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:31,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327903265] [2021-01-20 17:49:31,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:31,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:31,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:31,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:31,271 INFO L87 Difference]: Start difference. First operand 64666 states and 188650 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:31,998 INFO L93 Difference]: Finished difference Result 67738 states and 197610 transitions. [2021-01-20 17:49:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-20 17:49:31,999 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 17:49:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:32,000 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2021-01-20 17:49:32,000 INFO L78 Accepts]: Start accepts. Automaton has 67738 states and 197610 transitions. Word has length 48 [2021-01-20 17:49:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:32,001 INFO L481 AbstractCegarLoop]: Abstraction has 67738 states and 197610 transitions. [2021-01-20 17:49:32,001 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 17:49:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 67738 states and 197610 transitions. [2021-01-20 17:49:32,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:32,041 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:32,041 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 17:49:32,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-20 17:49:32,250 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:32,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:32,251 INFO L82 PathProgramCache]: Analyzing trace with hash -629767183, now seen corresponding path program 1 times [2021-01-20 17:49:32,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:32,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466028409] [2021-01-20 17:49:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:32,378 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 17:49:32,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466028409] [2021-01-20 17:49:32,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471010864] [2021-01-20 17:49:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:32,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:32,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:32,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:32,744 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 17:49:32,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:32,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:32,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443770503] [2021-01-20 17:49:32,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:32,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:32,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:32,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:32,746 INFO L87 Difference]: Start difference. First operand 67738 states and 197610 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:33,744 INFO L93 Difference]: Finished difference Result 68570 states and 200042 transitions. [2021-01-20 17:49:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 17:49:33,744 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 17:49:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:33,745 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-01-20 17:49:33,745 INFO L78 Accepts]: Start accepts. Automaton has 68570 states and 200042 transitions. Word has length 48 [2021-01-20 17:49:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:33,745 INFO L481 AbstractCegarLoop]: Abstraction has 68570 states and 200042 transitions. [2021-01-20 17:49:33,746 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 17:49:33,746 INFO L276 IsEmpty]: Start isEmpty. Operand 68570 states and 200042 transitions. [2021-01-20 17:49:33,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:33,775 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:33,775 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 17:49:33,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-20 17:49:33,990 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:33,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:33,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2054932487, now seen corresponding path program 2 times [2021-01-20 17:49:33,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:33,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704154214] [2021-01-20 17:49:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:34,108 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 17:49:34,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704154214] [2021-01-20 17:49:34,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20624464] [2021-01-20 17:49:34,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:34,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:34,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:34,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:34,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:34,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:34,303 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 17:49:34,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:34,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:34,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109860519] [2021-01-20 17:49:34,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:34,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:34,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:34,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:34,310 INFO L87 Difference]: Start difference. First operand 68570 states and 200042 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:35,206 INFO L93 Difference]: Finished difference Result 69466 states and 202666 transitions. [2021-01-20 17:49:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 17:49:35,206 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 17:49:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:35,207 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=932, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 17:49:35,208 INFO L78 Accepts]: Start accepts. Automaton has 69466 states and 202666 transitions. Word has length 48 [2021-01-20 17:49:35,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:35,208 INFO L481 AbstractCegarLoop]: Abstraction has 69466 states and 202666 transitions. [2021-01-20 17:49:35,208 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 17:49:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 69466 states and 202666 transitions. [2021-01-20 17:49:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:35,457 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:35,458 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 17:49:35,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:35,659 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:35,660 INFO L82 PathProgramCache]: Analyzing trace with hash -172515643, now seen corresponding path program 7 times [2021-01-20 17:49:35,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:35,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480149440] [2021-01-20 17:49:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:35,790 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 17:49:35,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480149440] [2021-01-20 17:49:35,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857454265] [2021-01-20 17:49:35,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:35,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:35,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:35,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:35,979 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 17:49:35,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:35,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:35,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907021346] [2021-01-20 17:49:35,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:35,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:35,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:35,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:35,981 INFO L87 Difference]: Start difference. First operand 69466 states and 202666 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:36,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:36,756 INFO L93 Difference]: Finished difference Result 72474 states and 211434 transitions. [2021-01-20 17:49:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 17:49:36,756 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 17:49:36,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:36,757 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=658, Unknown=0, NotChecked=0, Total=930 [2021-01-20 17:49:36,757 INFO L78 Accepts]: Start accepts. Automaton has 72474 states and 211434 transitions. Word has length 48 [2021-01-20 17:49:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:36,757 INFO L481 AbstractCegarLoop]: Abstraction has 72474 states and 211434 transitions. [2021-01-20 17:49:36,758 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 17:49:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 72474 states and 211434 transitions. [2021-01-20 17:49:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:37,021 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:37,021 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 17:49:37,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-20 17:49:37,222 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash -28824777, now seen corresponding path program 3 times [2021-01-20 17:49:37,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:37,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839842291] [2021-01-20 17:49:37,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:37,331 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 17:49:37,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839842291] [2021-01-20 17:49:37,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630698298] [2021-01-20 17:49:37,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:37,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 17:49:37,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:37,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:37,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:37,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:37,517 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 17:49:37,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:37,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:37,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633140922] [2021-01-20 17:49:37,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:37,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:37,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:37,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:37,520 INFO L87 Difference]: Start difference. First operand 72474 states and 211434 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:38,504 INFO L93 Difference]: Finished difference Result 73242 states and 213674 transitions. [2021-01-20 17:49:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 17:49:38,508 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 17:49:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:38,509 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 17:49:38,509 INFO L78 Accepts]: Start accepts. Automaton has 73242 states and 213674 transitions. Word has length 48 [2021-01-20 17:49:38,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:38,510 INFO L481 AbstractCegarLoop]: Abstraction has 73242 states and 213674 transitions. [2021-01-20 17:49:38,510 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 17:49:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 73242 states and 213674 transitions. [2021-01-20 17:49:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:38,551 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:38,551 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 17:49:38,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:38,769 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:38,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:38,770 INFO L82 PathProgramCache]: Analyzing trace with hash -601883841, now seen corresponding path program 8 times [2021-01-20 17:49:38,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:38,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794702161] [2021-01-20 17:49:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:38,900 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 17:49:38,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794702161] [2021-01-20 17:49:38,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834770882] [2021-01-20 17:49:38,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:38,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:38,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:38,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:39,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:39,080 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 17:49:39,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:39,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:39,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516593369] [2021-01-20 17:49:39,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:39,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:39,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:39,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:39,083 INFO L87 Difference]: Start difference. First operand 73242 states and 213674 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:40,034 INFO L93 Difference]: Finished difference Result 76826 states and 224106 transitions. [2021-01-20 17:49:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 17:49:40,035 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 17:49:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:40,036 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=293, Invalid=699, Unknown=0, NotChecked=0, Total=992 [2021-01-20 17:49:40,036 INFO L78 Accepts]: Start accepts. Automaton has 76826 states and 224106 transitions. Word has length 48 [2021-01-20 17:49:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:40,036 INFO L481 AbstractCegarLoop]: Abstraction has 76826 states and 224106 transitions. [2021-01-20 17:49:40,036 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 17:49:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 76826 states and 224106 transitions. [2021-01-20 17:49:40,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:40,060 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:40,060 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 17:49:40,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-20 17:49:40,262 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:40,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:40,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1900592739, now seen corresponding path program 9 times [2021-01-20 17:49:40,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:40,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660659305] [2021-01-20 17:49:40,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:40,385 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 17:49:40,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660659305] [2021-01-20 17:49:40,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096023815] [2021-01-20 17:49:40,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:40,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:49:40,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:40,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:40,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:40,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:42,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:42,790 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 17:49:42,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:42,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:42,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777203248] [2021-01-20 17:49:42,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:42,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:42,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:42,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=199, Unknown=1, NotChecked=0, Total=272 [2021-01-20 17:49:42,795 INFO L87 Difference]: Start difference. First operand 76826 states and 224106 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:47,124 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-01-20 17:49:51,361 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-01-20 17:49:55,646 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-01-20 17:50:02,997 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-01-20 17:52:02,727 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-01-20 17:52:29,385 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-01-20 17:55:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:06,122 INFO L93 Difference]: Finished difference Result 91418 states and 266730 transitions. [2021-01-20 17:55:06,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 17:55:06,123 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 17:55:06,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:06,124 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 64.2s TimeCoverageRelationStatistics Valid=585, Invalid=1647, Unknown=24, NotChecked=0, Total=2256 [2021-01-20 17:55:06,124 INFO L78 Accepts]: Start accepts. Automaton has 91418 states and 266730 transitions. Word has length 48 [2021-01-20 17:55:06,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:06,124 INFO L481 AbstractCegarLoop]: Abstraction has 91418 states and 266730 transitions. [2021-01-20 17:55:06,124 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 17:55:06,125 INFO L276 IsEmpty]: Start isEmpty. Operand 91418 states and 266730 transitions. [2021-01-20 17:55:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:55:06,161 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:06,161 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 17:55:06,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:06,362 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:06,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:06,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1741143189, now seen corresponding path program 4 times [2021-01-20 17:55:06,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:06,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108255128] [2021-01-20 17:55:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:06,515 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 17:55:06,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108255128] [2021-01-20 17:55:06,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902446077] [2021-01-20 17:55:06,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:06,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:55:06,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:06,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:55:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:06,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:55:06,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:06,800 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 17:55:06,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:06,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:55:06,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944548437] [2021-01-20 17:55:06,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:55:06,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:06,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:55:06,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:55:06,803 INFO L87 Difference]: Start difference. First operand 91418 states and 266730 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:08,678 INFO L93 Difference]: Finished difference Result 104282 states and 304234 transitions. [2021-01-20 17:55:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 17:55:08,679 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 17:55:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:08,680 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=475, Invalid=1417, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 17:55:08,680 INFO L78 Accepts]: Start accepts. Automaton has 104282 states and 304234 transitions. Word has length 48 [2021-01-20 17:55:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:08,680 INFO L481 AbstractCegarLoop]: Abstraction has 104282 states and 304234 transitions. [2021-01-20 17:55:08,680 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 17:55:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 104282 states and 304234 transitions. [2021-01-20 17:55:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:55:08,709 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:08,709 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 17:55:08,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-20 17:55:08,915 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:08,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1533122351, now seen corresponding path program 5 times [2021-01-20 17:55:08,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:08,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977433862] [2021-01-20 17:55:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:09,061 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 17:55:09,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977433862] [2021-01-20 17:55:09,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145730033] [2021-01-20 17:55:09,062 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 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 17:55:09,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 17:55:09,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:09,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:55:09,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:09,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:09,282 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 17:55:09,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:09,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:55:09,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581676505] [2021-01-20 17:55:09,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:55:09,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:09,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:55:09,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:55:09,287 INFO L87 Difference]: Start difference. First operand 104282 states and 304234 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:10,558 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-01-20 17:55:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:11,117 INFO L93 Difference]: Finished difference Result 118266 states and 344930 transitions. [2021-01-20 17:55:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 17:55:11,118 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 17:55:11,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:11,119 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=468, Invalid=1424, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 17:55:11,119 INFO L78 Accepts]: Start accepts. Automaton has 118266 states and 344930 transitions. Word has length 48 [2021-01-20 17:55:11,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:11,119 INFO L481 AbstractCegarLoop]: Abstraction has 118266 states and 344930 transitions. [2021-01-20 17:55:11,120 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 17:55:11,120 INFO L276 IsEmpty]: Start isEmpty. Operand 118266 states and 344930 transitions. [2021-01-20 17:55:11,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:55:11,151 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:11,151 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 17:55:11,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-20 17:55:11,357 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:11,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:11,358 INFO L82 PathProgramCache]: Analyzing trace with hash -119832043, now seen corresponding path program 6 times [2021-01-20 17:55:11,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:11,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129982236] [2021-01-20 17:55:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:11,511 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 17:55:11,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129982236] [2021-01-20 17:55:11,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61057072] [2021-01-20 17:55:11,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:11,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 17:55:11,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:11,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:55:11,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:11,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:55:11,719 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:11,726 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 17:55:11,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:11,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:55:11,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714717600] [2021-01-20 17:55:11,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:55:11,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:11,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:55:11,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:55:11,728 INFO L87 Difference]: Start difference. First operand 118266 states and 344930 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:14,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:14,568 INFO L93 Difference]: Finished difference Result 140642 states and 410066 transitions. [2021-01-20 17:55:14,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-20 17:55:14,569 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 17:55:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:14,571 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=845, Invalid=2577, Unknown=0, NotChecked=0, Total=3422 [2021-01-20 17:55:14,571 INFO L78 Accepts]: Start accepts. Automaton has 140642 states and 410066 transitions. Word has length 48 [2021-01-20 17:55:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:14,573 INFO L481 AbstractCegarLoop]: Abstraction has 140642 states and 410066 transitions. [2021-01-20 17:55:14,574 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 17:55:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 140642 states and 410066 transitions. [2021-01-20 17:55:14,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:14,648 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:14,648 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 17:55:14,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-20 17:55:14,863 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:14,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1611394660, now seen corresponding path program 10 times [2021-01-20 17:55:14,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:14,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005914175] [2021-01-20 17:55:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:15,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005914175] [2021-01-20 17:55:15,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907615187] [2021-01-20 17:55:15,095 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 17:55:15,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:55:15,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:15,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:15,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:15,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:15,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:15,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:15,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888035455] [2021-01-20 17:55:15,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:15,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:15,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:15,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:15,354 INFO L87 Difference]: Start difference. First operand 140642 states and 410066 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:16,752 INFO L93 Difference]: Finished difference Result 143650 states and 418834 transitions. [2021-01-20 17:55:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 17:55:16,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:16,754 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2021-01-20 17:55:16,754 INFO L78 Accepts]: Start accepts. Automaton has 143650 states and 418834 transitions. Word has length 53 [2021-01-20 17:55:16,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:16,754 INFO L481 AbstractCegarLoop]: Abstraction has 143650 states and 418834 transitions. [2021-01-20 17:55:16,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 143650 states and 418834 transitions. [2021-01-20 17:55:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:16,820 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:16,820 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 17:55:17,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-20 17:55:17,021 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:17,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:17,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1987547128, now seen corresponding path program 11 times [2021-01-20 17:55:17,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:17,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196035326] [2021-01-20 17:55:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:17,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196035326] [2021-01-20 17:55:17,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984160072] [2021-01-20 17:55:17,234 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 17:55:17,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 17:55:17,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:17,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:17,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:17,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:17,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760328960] [2021-01-20 17:55:17,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:17,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:17,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:17,535 INFO L87 Difference]: Start difference. First operand 143650 states and 418834 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:19,178 INFO L93 Difference]: Finished difference Result 147234 states and 429330 transitions. [2021-01-20 17:55:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 17:55:19,179 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:19,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:19,180 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=1015, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 17:55:19,180 INFO L78 Accepts]: Start accepts. Automaton has 147234 states and 429330 transitions. Word has length 53 [2021-01-20 17:55:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:19,181 INFO L481 AbstractCegarLoop]: Abstraction has 147234 states and 429330 transitions. [2021-01-20 17:55:19,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 147234 states and 429330 transitions. [2021-01-20 17:55:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:19,246 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:19,246 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 17:55:19,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-20 17:55:19,447 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:19,448 INFO L82 PathProgramCache]: Analyzing trace with hash 144817900, now seen corresponding path program 7 times [2021-01-20 17:55:19,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:19,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544087617] [2021-01-20 17:55:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:19,652 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 17:55:19,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544087617] [2021-01-20 17:55:19,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498001488] [2021-01-20 17:55:19,652 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 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 17:55:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:19,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:19,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:19,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:19,876 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 17:55:19,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:19,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:19,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546935235] [2021-01-20 17:55:19,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:19,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:19,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:19,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:19,879 INFO L87 Difference]: Start difference. First operand 147234 states and 429330 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:21,523 INFO L93 Difference]: Finished difference Result 149218 states and 435154 transitions. [2021-01-20 17:55:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 17:55:21,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:21,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:21,525 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=429, Invalid=1211, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 17:55:21,525 INFO L78 Accepts]: Start accepts. Automaton has 149218 states and 435154 transitions. Word has length 53 [2021-01-20 17:55:21,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:21,525 INFO L481 AbstractCegarLoop]: Abstraction has 149218 states and 435154 transitions. [2021-01-20 17:55:21,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 149218 states and 435154 transitions. [2021-01-20 17:55:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:21,594 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:21,594 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 17:55:21,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:21,795 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:21,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:21,796 INFO L82 PathProgramCache]: Analyzing trace with hash -253297978, now seen corresponding path program 8 times [2021-01-20 17:55:21,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:21,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67317849] [2021-01-20 17:55:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:22,419 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2021-01-20 17:55:22,503 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 17:55:22,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67317849] [2021-01-20 17:55:22,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033218449] [2021-01-20 17:55:22,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:22,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:55:22,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:22,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:22,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:22,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:22,782 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 17:55:22,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:22,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:22,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578454932] [2021-01-20 17:55:22,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:22,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:22,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:22,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:22,784 INFO L87 Difference]: Start difference. First operand 149218 states and 435154 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:24,717 INFO L93 Difference]: Finished difference Result 153954 states and 448978 transitions. [2021-01-20 17:55:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 17:55:24,718 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:24,719 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 17:55:24,720 INFO L78 Accepts]: Start accepts. Automaton has 153954 states and 448978 transitions. Word has length 53 [2021-01-20 17:55:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:24,720 INFO L481 AbstractCegarLoop]: Abstraction has 153954 states and 448978 transitions. [2021-01-20 17:55:24,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 153954 states and 448978 transitions. [2021-01-20 17:55:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:24,808 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:24,808 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 17:55:25,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:25,022 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:25,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:25,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1610795128, now seen corresponding path program 9 times [2021-01-20 17:55:25,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:25,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339144351] [2021-01-20 17:55:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:25,184 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 17:55:25,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339144351] [2021-01-20 17:55:25,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795823576] [2021-01-20 17:55:25,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:25,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 17:55:25,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:25,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:25,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:25,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:25,456 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 17:55:25,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:25,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:25,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049691956] [2021-01-20 17:55:25,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:25,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:25,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:25,459 INFO L87 Difference]: Start difference. First operand 153954 states and 448978 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:27,259 INFO L93 Difference]: Finished difference Result 156514 states and 456466 transitions. [2021-01-20 17:55:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 17:55:27,260 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:27,261 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 17:55:27,261 INFO L78 Accepts]: Start accepts. Automaton has 156514 states and 456466 transitions. Word has length 53 [2021-01-20 17:55:27,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:27,261 INFO L481 AbstractCegarLoop]: Abstraction has 156514 states and 456466 transitions. [2021-01-20 17:55:27,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 156514 states and 456466 transitions. [2021-01-20 17:55:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:27,328 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:27,328 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 17:55:27,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:27,534 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:27,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1156131728, now seen corresponding path program 10 times [2021-01-20 17:55:27,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:27,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292392582] [2021-01-20 17:55:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:27,716 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 17:55:27,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292392582] [2021-01-20 17:55:27,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179316690] [2021-01-20 17:55:27,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:27,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:55:27,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:27,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:27,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:27,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:27,950 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 17:55:27,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:27,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:27,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892777780] [2021-01-20 17:55:27,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:27,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:27,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:27,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:27,952 INFO L87 Difference]: Start difference. First operand 156514 states and 456466 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:28,985 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-01-20 17:55:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:30,246 INFO L93 Difference]: Finished difference Result 158434 states and 462098 transitions. [2021-01-20 17:55:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 17:55:30,247 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:30,248 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=594, Invalid=1758, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 17:55:30,249 INFO L78 Accepts]: Start accepts. Automaton has 158434 states and 462098 transitions. Word has length 53 [2021-01-20 17:55:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:30,249 INFO L481 AbstractCegarLoop]: Abstraction has 158434 states and 462098 transitions. [2021-01-20 17:55:30,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 158434 states and 462098 transitions. [2021-01-20 17:55:30,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:30,770 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:30,771 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 17:55:30,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-20 17:55:30,985 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:30,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:30,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1985432118, now seen corresponding path program 11 times [2021-01-20 17:55:30,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:30,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001108480] [2021-01-20 17:55:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:31,145 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 17:55:31,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001108480] [2021-01-20 17:55:31,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171407348] [2021-01-20 17:55:31,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:31,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 17:55:31,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:31,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:31,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:31,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:31,422 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 17:55:31,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:31,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:31,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483902088] [2021-01-20 17:55:31,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:31,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:31,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:31,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:31,425 INFO L87 Difference]: Start difference. First operand 158434 states and 462098 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:33,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:33,558 INFO L93 Difference]: Finished difference Result 161890 states and 472210 transitions. [2021-01-20 17:55:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 17:55:33,559 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:33,562 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=558, Invalid=1604, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 17:55:33,562 INFO L78 Accepts]: Start accepts. Automaton has 161890 states and 472210 transitions. Word has length 53 [2021-01-20 17:55:33,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:33,563 INFO L481 AbstractCegarLoop]: Abstraction has 161890 states and 472210 transitions. [2021-01-20 17:55:33,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 161890 states and 472210 transitions. [2021-01-20 17:55:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:33,634 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:33,634 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 17:55:33,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:33,835 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:33,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:33,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1738400478, now seen corresponding path program 12 times [2021-01-20 17:55:33,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:33,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655504557] [2021-01-20 17:55:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:34,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655504557] [2021-01-20 17:55:34,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140966173] [2021-01-20 17:55:34,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:34,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 17:55:34,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:34,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:34,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:34,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:34,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:34,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:34,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57203628] [2021-01-20 17:55:34,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:34,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:34,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:34,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:34,278 INFO L87 Difference]: Start difference. First operand 161890 states and 472210 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:35,994 INFO L93 Difference]: Finished difference Result 164834 states and 480786 transitions. [2021-01-20 17:55:35,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 17:55:35,995 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:35,996 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=365, Invalid=895, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 17:55:35,997 INFO L78 Accepts]: Start accepts. Automaton has 164834 states and 480786 transitions. Word has length 53 [2021-01-20 17:55:35,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:35,997 INFO L481 AbstractCegarLoop]: Abstraction has 164834 states and 480786 transitions. [2021-01-20 17:55:35,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:35,997 INFO L276 IsEmpty]: Start isEmpty. Operand 164834 states and 480786 transitions. [2021-01-20 17:55:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:36,074 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:36,074 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 17:55:36,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-20 17:55:36,275 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:36,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:36,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2114552946, now seen corresponding path program 13 times [2021-01-20 17:55:36,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:36,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778323482] [2021-01-20 17:55:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:36,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778323482] [2021-01-20 17:55:36,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657773565] [2021-01-20 17:55:36,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:36,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:36,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:37,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:37,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:37,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:37,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990774561] [2021-01-20 17:55:37,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:37,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:37,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:37,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:37,257 INFO L87 Difference]: Start difference. First operand 164834 states and 480786 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:39,486 INFO L93 Difference]: Finished difference Result 168290 states and 490898 transitions. [2021-01-20 17:55:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 17:55:39,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:39,503 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=460, Invalid=1180, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 17:55:39,503 INFO L78 Accepts]: Start accepts. Automaton has 168290 states and 490898 transitions. Word has length 53 [2021-01-20 17:55:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:39,503 INFO L481 AbstractCegarLoop]: Abstraction has 168290 states and 490898 transitions. [2021-01-20 17:55:39,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 168290 states and 490898 transitions. [2021-01-20 17:55:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:39,580 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:39,581 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 17:55:39,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:39,781 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:39,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:39,782 INFO L82 PathProgramCache]: Analyzing trace with hash 271823718, now seen corresponding path program 12 times [2021-01-20 17:55:39,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:39,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943300391] [2021-01-20 17:55:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:39,957 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 17:55:39,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943300391] [2021-01-20 17:55:39,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755286692] [2021-01-20 17:55:39,958 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 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 17:55:40,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 17:55:40,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:40,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:40,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:40,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:40,198 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 17:55:40,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:40,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:40,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672701638] [2021-01-20 17:55:40,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:40,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:40,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:40,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:40,201 INFO L87 Difference]: Start difference. First operand 168290 states and 490898 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:42,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:42,458 INFO L93 Difference]: Finished difference Result 170146 states and 496338 transitions. [2021-01-20 17:55:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 17:55:42,460 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:42,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:42,461 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 17:55:42,461 INFO L78 Accepts]: Start accepts. Automaton has 170146 states and 496338 transitions. Word has length 53 [2021-01-20 17:55:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:42,461 INFO L481 AbstractCegarLoop]: Abstraction has 170146 states and 496338 transitions. [2021-01-20 17:55:42,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 170146 states and 496338 transitions. [2021-01-20 17:55:42,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:42,526 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:42,526 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 17:55:42,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-20 17:55:42,727 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:42,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:42,728 INFO L82 PathProgramCache]: Analyzing trace with hash -126292160, now seen corresponding path program 13 times [2021-01-20 17:55:42,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:42,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740746294] [2021-01-20 17:55:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:42,894 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 17:55:42,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740746294] [2021-01-20 17:55:42,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128824624] [2021-01-20 17:55:42,895 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 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 17:55:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:42,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:43,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:43,160 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 17:55:43,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:43,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:43,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133524367] [2021-01-20 17:55:43,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:43,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:43,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:43,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:43,163 INFO L87 Difference]: Start difference. First operand 170146 states and 496338 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:45,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:45,127 INFO L93 Difference]: Finished difference Result 171810 states and 501202 transitions. [2021-01-20 17:55:45,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 17:55:45,127 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:45,128 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=456, Invalid=1350, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 17:55:45,128 INFO L78 Accepts]: Start accepts. Automaton has 171810 states and 501202 transitions. Word has length 53 [2021-01-20 17:55:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:45,129 INFO L481 AbstractCegarLoop]: Abstraction has 171810 states and 501202 transitions. [2021-01-20 17:55:45,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 171810 states and 501202 transitions. [2021-01-20 17:55:45,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:45,201 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:45,201 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 17:55:45,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:45,417 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:45,418 INFO L82 PathProgramCache]: Analyzing trace with hash 272515748, now seen corresponding path program 14 times [2021-01-20 17:55:45,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:45,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084805693] [2021-01-20 17:55:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:45,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084805693] [2021-01-20 17:55:45,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471239927] [2021-01-20 17:55:45,597 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 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 17:55:45,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:55:45,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:45,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:45,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:45,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:45,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:45,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:45,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386352148] [2021-01-20 17:55:45,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:45,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:45,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:45,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:45,838 INFO L87 Difference]: Start difference. First operand 171810 states and 501202 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:47,840 INFO L93 Difference]: Finished difference Result 174690 states and 509586 transitions. [2021-01-20 17:55:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 17:55:47,841 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:47,842 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=386, Invalid=946, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 17:55:47,842 INFO L78 Accepts]: Start accepts. Automaton has 174690 states and 509586 transitions. Word has length 53 [2021-01-20 17:55:47,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:47,842 INFO L481 AbstractCegarLoop]: Abstraction has 174690 states and 509586 transitions. [2021-01-20 17:55:47,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:47,843 INFO L276 IsEmpty]: Start isEmpty. Operand 174690 states and 509586 transitions. [2021-01-20 17:55:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:47,937 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:47,937 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 17:55:48,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-20 17:55:48,138 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:48,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:48,139 INFO L82 PathProgramCache]: Analyzing trace with hash 648668216, now seen corresponding path program 15 times [2021-01-20 17:55:48,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:48,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223631201] [2021-01-20 17:55:48,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:48,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223631201] [2021-01-20 17:55:48,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766782360] [2021-01-20 17:55:48,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:55:48,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 17:55:48,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:48,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:48,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:48,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:48,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:48,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:48,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659653766] [2021-01-20 17:55:48,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:48,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:48,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:48,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:48,648 INFO L87 Difference]: Start difference. First operand 174690 states and 509586 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:50,962 INFO L93 Difference]: Finished difference Result 176546 states and 515026 transitions. [2021-01-20 17:55:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 17:55:50,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:50,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:50,964 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=478, Invalid=1244, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 17:55:50,964 INFO L78 Accepts]: Start accepts. Automaton has 176546 states and 515026 transitions. Word has length 53 [2021-01-20 17:55:50,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:50,964 INFO L481 AbstractCegarLoop]: Abstraction has 176546 states and 515026 transitions. [2021-01-20 17:55:50,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:50,964 INFO L276 IsEmpty]: Start isEmpty. Operand 176546 states and 515026 transitions. [2021-01-20 17:55:51,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:51,040 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:51,040 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 17:55:51,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-20 17:55:51,241 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:51,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:51,242 INFO L82 PathProgramCache]: Analyzing trace with hash -156852450, now seen corresponding path program 16 times [2021-01-20 17:55:51,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:51,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696332854] [2021-01-20 17:55:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:51,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696332854] [2021-01-20 17:55:51,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970921445] [2021-01-20 17:55:51,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:55:52,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:55:52,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:52,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:52,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:52,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:52,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:52,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:55:52,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944388331] [2021-01-20 17:55:52,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:55:52,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:52,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:55:52,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:55:52,309 INFO L87 Difference]: Start difference. First operand 176546 states and 515026 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:53,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:55:53,703 INFO L93 Difference]: Finished difference Result 177314 states and 517266 transitions. [2021-01-20 17:55:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 17:55:53,704 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:55:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:55:53,705 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=413, Invalid=993, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 17:55:53,705 INFO L78 Accepts]: Start accepts. Automaton has 177314 states and 517266 transitions. Word has length 53 [2021-01-20 17:55:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:55:53,706 INFO L481 AbstractCegarLoop]: Abstraction has 177314 states and 517266 transitions. [2021-01-20 17:55:53,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:55:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 177314 states and 517266 transitions. [2021-01-20 17:55:54,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:55:54,391 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:55:54,391 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 17:55:54,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-20 17:55:54,592 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:55:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:55:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1455561348, now seen corresponding path program 17 times [2021-01-20 17:55:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:55:54,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946879335] [2021-01-20 17:55:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:55:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:55:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:54,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946879335] [2021-01-20 17:55:54,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868901767] [2021-01-20 17:55:54,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:55:54,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 17:55:54,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:55:54,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:55:54,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:55:55,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:55:56,991 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:55:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:55:57,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:55:57,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:55:57,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633458197] [2021-01-20 17:55:57,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:55:57,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:55:57,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:55:57,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=249, Unknown=1, NotChecked=0, Total=342 [2021-01-20 17:55:57,017 INFO L87 Difference]: Start difference. First operand 177314 states and 517266 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:56:03,625 WARN L193 SmtUtils]: Spent 4.00 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-01-20 17:56:11,139 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-01-20 17:57:23,072 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 22 [2021-01-20 17:59:17,505 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-01-20 17:59:27,811 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-01-20 18:02:20,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:02:20,744 INFO L93 Difference]: Finished difference Result 248132 states and 722296 transitions. [2021-01-20 18:02:20,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 18:02:20,746 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 18:02:20,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:02:20,747 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 64.3s TimeCoverageRelationStatistics Valid=719, Invalid=2013, Unknown=24, NotChecked=0, Total=2756 [2021-01-20 18:02:20,747 INFO L78 Accepts]: Start accepts. Automaton has 248132 states and 722296 transitions. Word has length 53 [2021-01-20 18:02:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:02:20,748 INFO L481 AbstractCegarLoop]: Abstraction has 248132 states and 722296 transitions. [2021-01-20 18:02:20,748 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 18:02:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 248132 states and 722296 transitions. [2021-01-20 18:02:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 18:02:20,871 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:02:20,871 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:02:21,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-20 18:02:21,072 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:02:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:02:21,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1131171224, now seen corresponding path program 18 times [2021-01-20 18:02:21,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:02:21,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844397240] [2021-01-20 18:02:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:02:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:02:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:02:21,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844397240] [2021-01-20 18:02:21,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398360275] [2021-01-20 18:02:21,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:02:21,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 18:02:21,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:02:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:02:21,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:02:21,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:02:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:02:21,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:02:21,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 18:02:21,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24370797] [2021-01-20 18:02:21,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:02:21,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:02:21,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:02:21,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:02:21,677 INFO L87 Difference]: Start difference. First operand 248132 states and 722296 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:02:24,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:02:24,396 INFO L93 Difference]: Finished difference Result 255812 states and 744440 transitions. [2021-01-20 18:02:24,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 18:02:24,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 18:02:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:02:24,398 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=380, Invalid=952, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 18:02:24,398 INFO L78 Accepts]: Start accepts. Automaton has 255812 states and 744440 transitions. Word has length 53 [2021-01-20 18:02:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:02:24,399 INFO L481 AbstractCegarLoop]: Abstraction has 255812 states and 744440 transitions. [2021-01-20 18:02:24,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:02:24,399 INFO L276 IsEmpty]: Start isEmpty. Operand 255812 states and 744440 transitions. [2021-01-20 18:02:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 18:02:24,502 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:02:24,503 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:02:24,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:02:24,704 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:02:24,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:02:24,705 INFO L82 PathProgramCache]: Analyzing trace with hash 201940260, now seen corresponding path program 19 times [2021-01-20 18:02:24,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:02:24,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207426866] [2021-01-20 18:02:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:02:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:02:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:02:24,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207426866] [2021-01-20 18:02:24,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515812297] [2021-01-20 18:02:24,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:02:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:02:24,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:02:25,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:02:25,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:02:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:02:25,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:02:25,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 18:02:25,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501278748] [2021-01-20 18:02:25,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:02:25,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:02:25,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:02:25,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:02:25,370 INFO L87 Difference]: Start difference. First operand 255812 states and 744440 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:02:28,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:02:28,916 INFO L93 Difference]: Finished difference Result 262300 states and 763328 transitions. [2021-01-20 18:02:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:02:28,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 18:02:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:02:28,917 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=541, Invalid=1529, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 18:02:28,918 INFO L78 Accepts]: Start accepts. Automaton has 262300 states and 763328 transitions. Word has length 53 [2021-01-20 18:02:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:02:28,918 INFO L481 AbstractCegarLoop]: Abstraction has 262300 states and 763328 transitions. [2021-01-20 18:02:28,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:02:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 262300 states and 763328 transitions. [2021-01-20 18:02:29,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 18:02:29,830 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:02:29,830 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:02:30,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-20 18:02:30,048 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:02:30,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:02:30,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1615230568, now seen corresponding path program 20 times [2021-01-20 18:02:30,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:02:30,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909571456] [2021-01-20 18:02:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:02:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:02:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:02:30,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909571456] [2021-01-20 18:02:30,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216330560] [2021-01-20 18:02:30,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:02:30,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:02:30,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:02:30,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:02:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:02:30,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:02:30,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:02:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:02:30,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:02:30,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 18:02:30,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970277637] [2021-01-20 18:02:30,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:02:30,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:02:30,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:02:30,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:02:30,741 INFO L87 Difference]: Start difference. First operand 262300 states and 763328 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:02:35,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:02:35,127 INFO L93 Difference]: Finished difference Result 299720 states and 872668 transitions. [2021-01-20 18:02:35,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 18:02:35,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 18:02:35,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:02:35,130 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=818, Invalid=2262, Unknown=0, NotChecked=0, Total=3080 [2021-01-20 18:02:35,130 INFO L78 Accepts]: Start accepts. Automaton has 299720 states and 872668 transitions. Word has length 53 [2021-01-20 18:02:35,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:02:35,131 INFO L481 AbstractCegarLoop]: Abstraction has 299720 states and 872668 transitions. [2021-01-20 18:02:35,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:02:35,131 INFO L276 IsEmpty]: Start isEmpty. Operand 299720 states and 872668 transitions. [2021-01-20 18:02:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 18:02:35,221 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:02:35,222 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 18:02:35,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-20 18:02:35,426 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:02:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:02:35,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1088090960, now seen corresponding path program 14 times [2021-01-20 18:02:35,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:02:35,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241344488] [2021-01-20 18:02:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:02:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:02:35,659 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 18:02:35,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241344488] [2021-01-20 18:02:35,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123276247] [2021-01-20 18:02:35,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:02:35,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:02:35,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:02:35,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:02:35,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:02:35,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:02:35,999 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 18:02:36,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:02:36,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 18:02:36,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039480030] [2021-01-20 18:02:36,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:02:36,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:02:36,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:02:36,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:02:36,001 INFO L87 Difference]: Start difference. First operand 299720 states and 872668 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:02:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:02:40,613 INFO L93 Difference]: Finished difference Result 302920 states and 882076 transitions. [2021-01-20 18:02:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 18:02:40,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 18:02:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:02:40,616 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=627, Invalid=1923, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 18:02:40,616 INFO L78 Accepts]: Start accepts. Automaton has 302920 states and 882076 transitions. Word has length 53 [2021-01-20 18:02:40,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:02:40,616 INFO L481 AbstractCegarLoop]: Abstraction has 302920 states and 882076 transitions. [2021-01-20 18:02:40,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:02:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 302920 states and 882076 transitions. [2021-01-20 18:02:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 18:02:40,834 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:02:40,834 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 18:02:41,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:02:41,048 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:02:41,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:02:41,049 INFO L82 PathProgramCache]: Analyzing trace with hash 325199348, now seen corresponding path program 15 times [2021-01-20 18:02:41,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:02:41,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961428752] [2021-01-20 18:02:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:02:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:02:41,358 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 18:02:41,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961428752] [2021-01-20 18:02:41,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516565609] [2021-01-20 18:02:41,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:02:41,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 18:02:41,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:02:41,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:02:41,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:02:41,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:02:41,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:02:41,765 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 18:02:41,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:02:41,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 18:02:41,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220829808] [2021-01-20 18:02:41,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:02:41,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:02:41,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:02:41,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:02:41,768 INFO L87 Difference]: Start difference. First operand 302920 states and 882076 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:02:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:02:47,040 INFO L93 Difference]: Finished difference Result 341126 states and 993558 transitions. [2021-01-20 18:02:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-20 18:02:47,042 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 18:02:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:02:47,043 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1271, Invalid=4131, Unknown=0, NotChecked=0, Total=5402 [2021-01-20 18:02:47,043 INFO L78 Accepts]: Start accepts. Automaton has 341126 states and 993558 transitions. Word has length 53 [2021-01-20 18:02:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:02:47,043 INFO L481 AbstractCegarLoop]: Abstraction has 341126 states and 993558 transitions. [2021-01-20 18:02:47,043 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 18:02:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand 341126 states and 993558 transitions. [2021-01-20 18:02:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 18:02:48,041 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:02:48,041 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 18:02:48,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-20 18:02:48,242 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:02:48,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:02:48,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1407530148, now seen corresponding path program 16 times [2021-01-20 18:02:48,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:02:48,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303884008] [2021-01-20 18:02:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:02:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:02:48,500 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 18:02:48,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303884008] [2021-01-20 18:02:48,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691118270] [2021-01-20 18:02:48,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:02:48,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:02:48,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:02:48,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:02:48,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:02:48,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:02:48,853 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 18:02:48,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:02:48,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 18:02:48,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180739081] [2021-01-20 18:02:48,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:02:48,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:02:48,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:02:48,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:02:48,856 INFO L87 Difference]: Start difference. First operand 341126 states and 993558 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:02:53,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:02:53,086 INFO L93 Difference]: Finished difference Result 350054 states and 1019662 transitions. [2021-01-20 18:02:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 18:02:53,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 18:02:53,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:02:53,088 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=718, Invalid=2252, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 18:02:53,088 INFO L78 Accepts]: Start accepts. Automaton has 350054 states and 1019662 transitions. Word has length 53 [2021-01-20 18:02:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:02:53,089 INFO L481 AbstractCegarLoop]: Abstraction has 350054 states and 1019662 transitions. [2021-01-20 18:02:53,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:02:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 350054 states and 1019662 transitions. [2021-01-20 18:02:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 18:02:53,173 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:02:53,173 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 18:02:53,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:02:53,374 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:02:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:02:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1474146840, now seen corresponding path program 17 times [2021-01-20 18:02:53,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:02:53,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35312928] [2021-01-20 18:02:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:02:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:02:53,644 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 18:02:53,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35312928] [2021-01-20 18:02:53,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577117085] [2021-01-20 18:02:53,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:02:53,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 18:02:53,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:02:53,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:02:53,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:02:53,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:02:54,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:02:54,093 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 18:02:54,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:02:54,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 18:02:54,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791211444] [2021-01-20 18:02:54,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:02:54,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:02:54,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:02:54,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:02:54,095 INFO L87 Difference]: Start difference. First operand 350054 states and 1019662 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:02:55,302 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-01-20 18:03:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:03:00,985 INFO L93 Difference]: Finished difference Result 388110 states and 1130686 transitions. [2021-01-20 18:03:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-20 18:03:00,987 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 18:03:00,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:03:00,988 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1379, Invalid=4627, Unknown=0, NotChecked=0, Total=6006 [2021-01-20 18:03:00,988 INFO L78 Accepts]: Start accepts. Automaton has 388110 states and 1130686 transitions. Word has length 53 [2021-01-20 18:03:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:03:00,989 INFO L481 AbstractCegarLoop]: Abstraction has 388110 states and 1130686 transitions. [2021-01-20 18:03:00,989 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 18:03:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 388110 states and 1130686 transitions. [2021-01-20 18:03:01,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 18:03:01,109 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:03:01,109 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 18:03:01,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-20 18:03:01,323 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:03:01,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:03:01,324 INFO L82 PathProgramCache]: Analyzing trace with hash 973842700, now seen corresponding path program 18 times [2021-01-20 18:03:01,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:03:01,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487633421] [2021-01-20 18:03:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:03:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:03:01,608 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 18:03:01,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487633421] [2021-01-20 18:03:01,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532149018] [2021-01-20 18:03:01,609 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 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 18:03:01,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 18:03:01,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:03:01,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:03:01,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:03:03,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:03:03,092 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 18:03:03,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:03:03,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 18:03:03,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857720693] [2021-01-20 18:03:03,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:03:03,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:03:03,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:03:03,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:03:03,096 INFO L87 Difference]: Start difference. First operand 388110 states and 1130686 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:03:09,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:03:09,820 INFO L93 Difference]: Finished difference Result 399374 states and 1163518 transitions. [2021-01-20 18:03:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-20 18:03:09,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 Received shutdown request... [2021-01-20 18:03:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:03:09,824 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=891, Invalid=3015, Unknown=0, NotChecked=0, Total=3906 [2021-01-20 18:03:09,826 INFO L78 Accepts]: Start accepts. Automaton has 399374 states and 1163518 transitions. Word has length 53 [2021-01-20 18:03:10,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-20 18:03:10,028 WARN L546 AbstractCegarLoop]: Verification canceled [2021-01-20 18:03:10,033 WARN L250 ceAbstractionStarter]: Timeout [2021-01-20 18:03:10,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 06:03:10 BasicIcfg [2021-01-20 18:03:10,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-20 18:03:10,034 INFO L168 Benchmark]: Toolchain (without parser) took 836101.86 ms. Allocated memory was 302.0 MB in the beginning and 13.3 GB in the end (delta: 13.0 GB). Free memory was 277.3 MB in the beginning and 7.0 GB in the end (delta: -6.8 GB). Peak memory consumption was 6.8 GB. Max. memory is 16.0 GB. [2021-01-20 18:03:10,035 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 302.0 MB. Free memory was 271.9 MB in the beginning and 271.9 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-01-20 18:03:10,035 INFO L168 Benchmark]: CACSL2BoogieTranslator took 768.89 ms. Allocated memory is still 302.0 MB. Free memory was 277.2 MB in the beginning and 248.1 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2021-01-20 18:03:10,035 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.59 ms. Allocated memory is still 302.0 MB. Free memory was 248.1 MB in the beginning and 246.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-20 18:03:10,036 INFO L168 Benchmark]: Boogie Preprocessor took 88.13 ms. Allocated memory is still 302.0 MB. Free memory was 246.2 MB in the beginning and 284.7 MB in the end (delta: -38.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.0 GB. [2021-01-20 18:03:10,036 INFO L168 Benchmark]: RCFGBuilder took 487.84 ms. Allocated memory is still 302.0 MB. Free memory was 284.7 MB in the beginning and 262.6 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-01-20 18:03:10,037 INFO L168 Benchmark]: TraceAbstraction took 834655.48 ms. Allocated memory was 302.0 MB in the beginning and 13.3 GB in the end (delta: 13.0 GB). Free memory was 261.6 MB in the beginning and 7.0 GB in the end (delta: -6.8 GB). Peak memory consumption was 6.8 GB. Max. memory is 16.0 GB. [2021-01-20 18:03:10,039 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 302.0 MB. Free memory was 271.9 MB in the beginning and 271.9 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 768.89 ms. Allocated memory is still 302.0 MB. Free memory was 277.2 MB in the beginning and 248.1 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 86.59 ms. Allocated memory is still 302.0 MB. Free memory was 248.1 MB in the beginning and 246.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 88.13 ms. Allocated memory is still 302.0 MB. Free memory was 246.2 MB in the beginning and 284.7 MB in the end (delta: -38.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.0 GB. * RCFGBuilder took 487.84 ms. Allocated memory is still 302.0 MB. Free memory was 284.7 MB in the beginning and 262.6 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 834655.48 ms. Allocated memory was 302.0 MB in the beginning and 13.3 GB in the end (delta: 13.0 GB). Free memory was 261.6 MB in the beginning and 7.0 GB in the end (delta: -6.8 GB). Peak memory consumption was 6.8 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 executing Accepts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 834.4s, OverallIterations: 49, TraceHistogramMax: 4, AutomataDifference: 791.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 4727 SDtfs, 42958 SDslu, 51762 SDs, 0 SdLazy, 8119 SolverSat, 1999 SolverUnsat, 313 SolverUnknown, 0 SolverNotchecked, 585.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3586 GetRequests, 1833 SyntacticMatches, 32 SemanticMatches, 1721 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23547 ImplicationChecksByTransitivity, 178.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=388110occurred in iteration=48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 22.6s InterpolantComputationTime, 4383 NumberOfCodeBlocks, 4383 NumberOfCodeBlocksAsserted, 146 NumberOfCheckSat, 4292 ConstructedInterpolants, 2 QuantifiedInterpolants, 1464737 SizeOfPredicates, 170 NumberOfNonLiveVariables, 5287 ConjunctsInSsa, 477 ConjunctsInUnsatCore, 91 InterpolantComputations, 7 PerfectInterpolantSequences, 0/882 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 [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process !SESSION 2021-01-20 17:49:10.256 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.9 java.vendor=AdoptOpenJDK BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_GB Framework arguments: -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-keepdead.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i Command-line arguments: -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-keepdead.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i !ENTRY org.eclipse.osgi 4 0 2021-01-20 18:03:10.330 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee940de14/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee940de14/.metadata/.log.