/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 16:11:38,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 16:11:38,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 16:11:38,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 16:11:38,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 16:11:38,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 16:11:38,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 16:11:38,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 16:11:38,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 16:11:38,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 16:11:38,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 16:11:38,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 16:11:38,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 16:11:38,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 16:11:38,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 16:11:38,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 16:11:38,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 16:11:38,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 16:11:38,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 16:11:38,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 16:11:38,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 16:11:38,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 16:11:38,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 16:11:38,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 16:11:38,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 16:11:38,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 16:11:38,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 16:11:38,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 16:11:38,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 16:11:38,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 16:11:38,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 16:11:38,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 16:11:38,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 16:11:38,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 16:11:38,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 16:11:38,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 16:11:38,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 16:11:38,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 16:11:38,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 16:11:38,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 16:11:38,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 16:11:38,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-11 16:11:38,523 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 16:11:38,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 16:11:38,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 16:11:38,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 16:11:38,525 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 16:11:38,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 16:11:38,526 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 16:11:38,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 16:11:38,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 16:11:38,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 16:11:38,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 16:11:38,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 16:11:38,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 16:11:38,527 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 16:11:38,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 16:11:38,527 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 16:11:38,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 16:11:38,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 16:11:38,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 16:11:38,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 16:11:38,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 16:11:38,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 16:11:38,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 16:11:38,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 16:11:38,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 16:11:38,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 16:11:38,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 16:11:38,530 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 16:11:38,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 16:11:39,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 16:11:39,814 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 16:11:39,821 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 16:11:39,823 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 16:11:39,823 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 16:11:39,824 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-09-11 16:11:39,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1335eab1d/e68ff457db4341878ef749bb95050698/FLAG045b1753a [2020-09-11 16:11:40,533 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 16:11:40,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-09-11 16:11:40,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1335eab1d/e68ff457db4341878ef749bb95050698/FLAG045b1753a [2020-09-11 16:11:40,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1335eab1d/e68ff457db4341878ef749bb95050698 [2020-09-11 16:11:40,827 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 16:11:40,833 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 16:11:40,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 16:11:40,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 16:11:40,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 16:11:40,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:11:40" (1/1) ... [2020-09-11 16:11:40,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32d726a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:40, skipping insertion in model container [2020-09-11 16:11:40,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:11:40" (1/1) ... [2020-09-11 16:11:40,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 16:11:40,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 16:11:41,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:11:41,521 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 16:11:41,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:11:41,706 INFO L208 MainTranslator]: Completed translation [2020-09-11 16:11:41,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:41 WrapperNode [2020-09-11 16:11:41,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 16:11:41,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 16:11:41,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 16:11:41,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 16:11:41,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:41" (1/1) ... [2020-09-11 16:11:41,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:41" (1/1) ... [2020-09-11 16:11:41,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 16:11:41,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 16:11:41,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 16:11:41,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 16:11:41,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:41" (1/1) ... [2020-09-11 16:11:41,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:41" (1/1) ... [2020-09-11 16:11:41,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:41" (1/1) ... [2020-09-11 16:11:41,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:41" (1/1) ... [2020-09-11 16:11:41,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:41" (1/1) ... [2020-09-11 16:11:41,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:41" (1/1) ... [2020-09-11 16:11:41,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:41" (1/1) ... [2020-09-11 16:11:41,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 16:11:41,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 16:11:41,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 16:11:41,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 16:11:41,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 16:11:41,893 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 16:11:41,893 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 16:11:41,893 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 16:11:41,893 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 16:11:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 16:11:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 16:11:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 16:11:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 16:11:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 16:11:41,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 16:11:41,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 16:11:41,897 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 16:11:42,284 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 16:11:42,285 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 16:11:42,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:11:42 BoogieIcfgContainer [2020-09-11 16:11:42,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 16:11:42,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 16:11:42,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 16:11:42,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 16:11:42,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 04:11:40" (1/3) ... [2020-09-11 16:11:42,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105f52b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:11:42, skipping insertion in model container [2020-09-11 16:11:42,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:41" (2/3) ... [2020-09-11 16:11:42,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105f52b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:11:42, skipping insertion in model container [2020-09-11 16:11:42,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:11:42" (3/3) ... [2020-09-11 16:11:42,301 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-09-11 16:11:42,313 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 16:11:42,314 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 16:11:42,324 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 16:11:42,326 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 16:11:42,355 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,355 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,355 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,356 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,356 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,356 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,357 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,357 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,357 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,357 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,358 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,358 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,358 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,359 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,359 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,360 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,360 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,360 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,360 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,361 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,361 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,361 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,361 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,362 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,362 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,362 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,363 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,363 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,363 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,363 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,368 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,369 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,369 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,369 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,370 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,370 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,380 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,380 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,380 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,381 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,381 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,381 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,406 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 16:11:42,430 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 16:11:42,430 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 16:11:42,430 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 16:11:42,430 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 16:11:42,431 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 16:11:42,431 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 16:11:42,431 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 16:11:42,431 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 16:11:42,449 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-09-11 16:11:42,452 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-11 16:11:42,498 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-11 16:11:42,499 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 16:11:42,506 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-11 16:11:42,509 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-11 16:11:42,529 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-11 16:11:42,529 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 16:11:42,530 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-11 16:11:42,532 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-09-11 16:11:42,535 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 16:11:43,637 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-09-11 16:11:43,739 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-09-11 16:11:43,739 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-11 16:11:43,744 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 16:11:43,759 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 16:11:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 16:11:43,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 16:11:43,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:43,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 16:11:43,771 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:43,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-09-11 16:11:43,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:43,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947439323] [2020-09-11 16:11:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:44,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947439323] [2020-09-11 16:11:44,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:44,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 16:11:44,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862332492] [2020-09-11 16:11:44,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 16:11:44,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:44,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 16:11:44,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 16:11:44,104 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 16:11:44,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:44,185 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-09-11 16:11:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 16:11:44,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 16:11:44,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:44,204 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:11:44,205 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:11:44,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:11:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:11:44,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-11 16:11:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:11:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-09-11 16:11:44,269 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-09-11 16:11:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:44,270 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-09-11 16:11:44,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 16:11:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-09-11 16:11:44,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 16:11:44,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:44,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:44,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 16:11:44,272 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:44,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:44,273 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-09-11 16:11:44,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:44,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145289008] [2020-09-11 16:11:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:44,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145289008] [2020-09-11 16:11:44,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:44,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:11:44,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069953853] [2020-09-11 16:11:44,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 16:11:44,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:44,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 16:11:44,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:11:44,397 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-09-11 16:11:44,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:44,479 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-09-11 16:11:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:11:44,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 16:11:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:44,481 INFO L225 Difference]: With dead ends: 80 [2020-09-11 16:11:44,482 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 16:11:44,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-11 16:11:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 16:11:44,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-09-11 16:11:44,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 16:11:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-11 16:11:44,494 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-09-11 16:11:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:44,496 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-11 16:11:44,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 16:11:44,496 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-11 16:11:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 16:11:44,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:44,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:44,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 16:11:44,498 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:44,498 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-09-11 16:11:44,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:44,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918265500] [2020-09-11 16:11:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:44,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918265500] [2020-09-11 16:11:44,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:44,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:11:44,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403667850] [2020-09-11 16:11:44,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 16:11:44,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:44,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 16:11:44,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:11:44,614 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-09-11 16:11:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:44,646 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-09-11 16:11:44,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 16:11:44,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 16:11:44,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:44,648 INFO L225 Difference]: With dead ends: 73 [2020-09-11 16:11:44,648 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 16:11:44,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:11:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 16:11:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-11 16:11:44,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:11:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-09-11 16:11:44,659 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-09-11 16:11:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:44,659 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-09-11 16:11:44,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 16:11:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-09-11 16:11:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 16:11:44,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:44,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:44,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 16:11:44,661 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:44,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:44,662 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-09-11 16:11:44,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:44,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881727970] [2020-09-11 16:11:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:44,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881727970] [2020-09-11 16:11:44,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:44,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:11:44,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310819630] [2020-09-11 16:11:44,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 16:11:44,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:44,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 16:11:44,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:11:44,739 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-09-11 16:11:44,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:44,798 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-09-11 16:11:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:11:44,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 16:11:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:44,800 INFO L225 Difference]: With dead ends: 86 [2020-09-11 16:11:44,801 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 16:11:44,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-11 16:11:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 16:11:44,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-11 16:11:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:11:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-09-11 16:11:44,810 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-09-11 16:11:44,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:44,811 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-09-11 16:11:44,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 16:11:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-09-11 16:11:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 16:11:44,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:44,812 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:44,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 16:11:44,813 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:44,813 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-09-11 16:11:44,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:44,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374149196] [2020-09-11 16:11:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:44,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374149196] [2020-09-11 16:11:44,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142250018] [2020-09-11 16:11:44,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:45,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:45,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:45,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:11:45,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:45,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:11:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:45,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:45,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-09-11 16:11:45,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138844277] [2020-09-11 16:11:45,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:11:45,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:45,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:11:45,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:11:45,153 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-09-11 16:11:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:45,227 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-09-11 16:11:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:45,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-09-11 16:11:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:45,229 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:11:45,229 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:11:45,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:11:45,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:11:45,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-09-11 16:11:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:11:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-09-11 16:11:45,238 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-09-11 16:11:45,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:45,238 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-09-11 16:11:45,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:11:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-09-11 16:11:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 16:11:45,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:45,240 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:45,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:45,449 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:45,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-09-11 16:11:45,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:45,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205531255] [2020-09-11 16:11:45,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:45,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205531255] [2020-09-11 16:11:45,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161753463] [2020-09-11 16:11:45,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:45,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:11:45,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:45,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:11:45,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:45,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:45,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 16:11:45,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566190101] [2020-09-11 16:11:45,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:11:45,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:45,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:11:45,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:11:45,697 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-09-11 16:11:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:45,788 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 16:11:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:11:45,788 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 16:11:45,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:45,790 INFO L225 Difference]: With dead ends: 88 [2020-09-11 16:11:45,790 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:11:45,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:11:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:11:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-09-11 16:11:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:11:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 183 transitions. [2020-09-11 16:11:45,805 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 183 transitions. Word has length 9 [2020-09-11 16:11:45,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:45,805 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 183 transitions. [2020-09-11 16:11:45,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:11:45,806 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 183 transitions. [2020-09-11 16:11:45,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 16:11:45,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:45,809 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:46,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:46,024 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:46,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:46,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-09-11 16:11:46,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:46,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105090911] [2020-09-11 16:11:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:46,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105090911] [2020-09-11 16:11:46,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992328130] [2020-09-11 16:11:46,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:46,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:11:46,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:46,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:11:46,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:46,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:46,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 16:11:46,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431626342] [2020-09-11 16:11:46,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:11:46,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:46,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:11:46,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:11:46,275 INFO L87 Difference]: Start difference. First operand 76 states and 183 transitions. Second operand 9 states. [2020-09-11 16:11:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:46,352 INFO L93 Difference]: Finished difference Result 94 states and 221 transitions. [2020-09-11 16:11:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:11:46,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 16:11:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:46,354 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:11:46,354 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:11:46,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:11:46,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:11:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2020-09-11 16:11:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 16:11:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 190 transitions. [2020-09-11 16:11:46,366 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 190 transitions. Word has length 9 [2020-09-11 16:11:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:46,367 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 190 transitions. [2020-09-11 16:11:46,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:11:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 190 transitions. [2020-09-11 16:11:46,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 16:11:46,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:46,368 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:46,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:46,583 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:46,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-09-11 16:11:46,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:46,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905469368] [2020-09-11 16:11:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:46,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905469368] [2020-09-11 16:11:46,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372688999] [2020-09-11 16:11:46,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:46,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:46,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:46,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:11:46,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:46,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:11:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:46,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:46,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 16:11:46,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156345472] [2020-09-11 16:11:46,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:11:46,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:46,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:11:46,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:11:46,790 INFO L87 Difference]: Start difference. First operand 78 states and 190 transitions. Second operand 9 states. [2020-09-11 16:11:46,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:46,963 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-11 16:11:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:46,963 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 16:11:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:46,965 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:11:46,965 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:11:46,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:11:46,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:11:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2020-09-11 16:11:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 16:11:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-09-11 16:11:46,980 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 9 [2020-09-11 16:11:46,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:46,980 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-09-11 16:11:46,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:11:46,980 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-09-11 16:11:46,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:46,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:46,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:47,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:47,202 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:47,203 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 1 times [2020-09-11 16:11:47,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:47,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565492133] [2020-09-11 16:11:47,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:47,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565492133] [2020-09-11 16:11:47,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:47,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:11:47,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896446764] [2020-09-11 16:11:47,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:11:47,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:47,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:11:47,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:11:47,284 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-09-11 16:11:47,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:47,333 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-09-11 16:11:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:11:47,334 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:11:47,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:47,336 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:11:47,336 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:11:47,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-11 16:11:47,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:11:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-09-11 16:11:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 16:11:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-09-11 16:11:47,342 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-09-11 16:11:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:47,342 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-09-11 16:11:47,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:11:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-09-11 16:11:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:47,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:47,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:47,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-11 16:11:47,344 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:47,345 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 2 times [2020-09-11 16:11:47,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:47,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900892061] [2020-09-11 16:11:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:47,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900892061] [2020-09-11 16:11:47,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:47,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:11:47,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089811772] [2020-09-11 16:11:47,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:11:47,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:47,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:11:47,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:11:47,418 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-09-11 16:11:47,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:47,510 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-11 16:11:47,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:47,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:11:47,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:47,512 INFO L225 Difference]: With dead ends: 105 [2020-09-11 16:11:47,512 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:11:47,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:11:47,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:11:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-11 16:11:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:11:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-09-11 16:11:47,518 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-09-11 16:11:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:47,518 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-09-11 16:11:47,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:11:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-09-11 16:11:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:47,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:47,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:47,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-11 16:11:47,520 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:47,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:47,520 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 3 times [2020-09-11 16:11:47,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:47,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559140845] [2020-09-11 16:11:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:47,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559140845] [2020-09-11 16:11:47,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:47,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:11:47,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510536921] [2020-09-11 16:11:47,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:11:47,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:47,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:11:47,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:11:47,587 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-09-11 16:11:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:47,689 INFO L93 Difference]: Finished difference Result 105 states and 248 transitions. [2020-09-11 16:11:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:47,690 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:11:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:47,692 INFO L225 Difference]: With dead ends: 105 [2020-09-11 16:11:47,692 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:11:47,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:11:47,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:11:47,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-11 16:11:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:11:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-09-11 16:11:47,699 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-09-11 16:11:47,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:47,699 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-09-11 16:11:47,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:11:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-09-11 16:11:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:47,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:47,700 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:47,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-11 16:11:47,701 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:47,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:47,701 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-09-11 16:11:47,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:47,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64941105] [2020-09-11 16:11:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:47,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64941105] [2020-09-11 16:11:47,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510103103] [2020-09-11 16:11:47,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:47,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:11:47,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:47,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:47,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:47,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:11:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:47,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:47,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-11 16:11:47,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948901217] [2020-09-11 16:11:47,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:11:47,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:47,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:11:47,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:11:47,934 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-09-11 16:11:48,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:48,028 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-09-11 16:11:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:11:48,029 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-09-11 16:11:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:48,030 INFO L225 Difference]: With dead ends: 122 [2020-09-11 16:11:48,030 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 16:11:48,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:11:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 16:11:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-09-11 16:11:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 16:11:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-09-11 16:11:48,035 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-09-11 16:11:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:48,036 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-09-11 16:11:48,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:11:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-09-11 16:11:48,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:48,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:48,037 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:48,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-11 16:11:48,248 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:48,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-09-11 16:11:48,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:48,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450746405] [2020-09-11 16:11:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:48,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450746405] [2020-09-11 16:11:48,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447299514] [2020-09-11 16:11:48,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:48,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:11:48,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:48,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:48,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:48,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:48,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:48,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439324353] [2020-09-11 16:11:48,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:48,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:48,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:48,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:48,459 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-09-11 16:11:48,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:48,543 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-11 16:11:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:11:48,544 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 16:11:48,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:48,545 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:11:48,545 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:11:48,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:11:48,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:11:48,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-11 16:11:48,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-11 16:11:48,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-09-11 16:11:48,551 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-09-11 16:11:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:48,551 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-09-11 16:11:48,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-09-11 16:11:48,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:48,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:48,552 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:48,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:48,765 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:48,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-09-11 16:11:48,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:48,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515433722] [2020-09-11 16:11:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:48,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515433722] [2020-09-11 16:11:48,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819822142] [2020-09-11 16:11:48,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:48,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:48,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:49,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:49,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:49,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515611817] [2020-09-11 16:11:49,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:49,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:49,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:49,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:49,043 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-09-11 16:11:49,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:49,214 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-09-11 16:11:49,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:11:49,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 16:11:49,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:49,217 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:11:49,217 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:11:49,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:11:49,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:11:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-09-11 16:11:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-11 16:11:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-09-11 16:11:49,223 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-09-11 16:11:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:49,223 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-09-11 16:11:49,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-09-11 16:11:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:49,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:49,224 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:49,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-11 16:11:49,437 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:49,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:49,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-09-11 16:11:49,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:49,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932259733] [2020-09-11 16:11:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:49,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932259733] [2020-09-11 16:11:49,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687583504] [2020-09-11 16:11:49,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:49,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:49,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:49,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:49,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:49,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:49,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:49,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287261726] [2020-09-11 16:11:49,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:49,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:49,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:49,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:49,675 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-09-11 16:11:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:49,791 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-09-11 16:11:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:11:49,792 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 16:11:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:49,793 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:11:49,793 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 16:11:49,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:11:49,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 16:11:49,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-09-11 16:11:49,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-11 16:11:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-09-11 16:11:49,798 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-09-11 16:11:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:49,799 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-09-11 16:11:49,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-09-11 16:11:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:49,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:49,800 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:50,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 16:11:50,010 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:50,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:50,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-09-11 16:11:50,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:50,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029442395] [2020-09-11 16:11:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:50,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029442395] [2020-09-11 16:11:50,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607196402] [2020-09-11 16:11:50,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:50,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:11:50,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:50,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:50,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:50,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:11:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:50,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:50,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:50,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169489217] [2020-09-11 16:11:50,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:50,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:50,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:50,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:50,198 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-09-11 16:11:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:50,408 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-09-11 16:11:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:11:50,409 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 16:11:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:50,410 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:11:50,410 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:11:50,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:11:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:11:50,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-09-11 16:11:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-11 16:11:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-11 16:11:50,415 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-09-11 16:11:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:50,415 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-11 16:11:50,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:50,416 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-11 16:11:50,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:50,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:50,416 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:50,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 16:11:50,628 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:50,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 4 times [2020-09-11 16:11:50,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:50,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135602706] [2020-09-11 16:11:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:50,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135602706] [2020-09-11 16:11:50,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117160031] [2020-09-11 16:11:50,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:50,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:11:50,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:50,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:50,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:50,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:50,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:50,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123644892] [2020-09-11 16:11:50,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:50,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:50,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:50,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:50,850 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-09-11 16:11:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:50,926 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-09-11 16:11:50,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:11:50,926 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:50,927 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:11:50,927 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:11:50,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:11:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-09-11 16:11:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-11 16:11:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-11 16:11:50,932 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-09-11 16:11:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:50,932 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-11 16:11:50,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-11 16:11:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:50,933 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:50,933 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:51,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 16:11:51,135 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:51,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 5 times [2020-09-11 16:11:51,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:51,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542300747] [2020-09-11 16:11:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:51,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542300747] [2020-09-11 16:11:51,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818793370] [2020-09-11 16:11:51,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:51,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:51,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:51,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:51,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:51,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:51,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:51,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513043447] [2020-09-11 16:11:51,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:51,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:51,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:51,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:51,352 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-09-11 16:11:51,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:51,414 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-09-11 16:11:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:11:51,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:51,415 INFO L225 Difference]: With dead ends: 118 [2020-09-11 16:11:51,416 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 16:11:51,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:11:51,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 16:11:51,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-09-11 16:11:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-11 16:11:51,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-09-11 16:11:51,420 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-09-11 16:11:51,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:51,420 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-09-11 16:11:51,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:51,421 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-09-11 16:11:51,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:51,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:51,421 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:51,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 16:11:51,632 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 6 times [2020-09-11 16:11:51,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:51,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078952125] [2020-09-11 16:11:51,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:51,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078952125] [2020-09-11 16:11:51,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799147240] [2020-09-11 16:11:51,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:51,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:11:51,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:51,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:51,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:51,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:51,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:51,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478778506] [2020-09-11 16:11:51,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:51,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:51,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:51,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:51,860 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-09-11 16:11:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:52,026 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-09-11 16:11:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:52,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:52,027 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:11:52,028 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 16:11:52,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:11:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 16:11:52,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2020-09-11 16:11:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-11 16:11:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-09-11 16:11:52,032 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-09-11 16:11:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:52,032 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-09-11 16:11:52,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-09-11 16:11:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:52,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:52,033 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:52,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:52,243 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:52,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:52,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 7 times [2020-09-11 16:11:52,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:52,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421853139] [2020-09-11 16:11:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:52,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421853139] [2020-09-11 16:11:52,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130285673] [2020-09-11 16:11:52,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:52,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:52,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:52,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:52,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:52,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930519794] [2020-09-11 16:11:52,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:52,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:52,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:52,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:52,505 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-09-11 16:11:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:52,563 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-09-11 16:11:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:11:52,563 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:52,565 INFO L225 Difference]: With dead ends: 122 [2020-09-11 16:11:52,565 INFO L226 Difference]: Without dead ends: 120 [2020-09-11 16:11:52,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:11:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-11 16:11:52,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-09-11 16:11:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-11 16:11:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-09-11 16:11:52,570 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-09-11 16:11:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:52,570 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-09-11 16:11:52,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-09-11 16:11:52,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:52,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:52,571 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:52,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-09-11 16:11:52,781 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:52,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:52,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 8 times [2020-09-11 16:11:52,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:52,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337506611] [2020-09-11 16:11:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:52,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337506611] [2020-09-11 16:11:52,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192393735] [2020-09-11 16:11:52,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:52,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:52,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:52,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:52,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:53,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:53,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:53,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336473596] [2020-09-11 16:11:53,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:53,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:53,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:53,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:53,037 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-09-11 16:11:53,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:53,157 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-09-11 16:11:53,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:53,157 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:53,159 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:11:53,159 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 16:11:53,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:11:53,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 16:11:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-11 16:11:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 16:11:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-09-11 16:11:53,165 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-09-11 16:11:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:53,166 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-09-11 16:11:53,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-09-11 16:11:53,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:53,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:53,167 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:53,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:53,381 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:53,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:53,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 9 times [2020-09-11 16:11:53,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:53,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118268521] [2020-09-11 16:11:53,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:53,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118268521] [2020-09-11 16:11:53,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106905284] [2020-09-11 16:11:53,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:53,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:11:53,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:53,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:53,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:53,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:53,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181868009] [2020-09-11 16:11:53,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:53,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:53,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:53,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:53,609 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-09-11 16:11:53,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:53,701 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-11 16:11:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:53,702 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:53,703 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:11:53,704 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 16:11:53,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:11:53,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 16:11:53,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-09-11 16:11:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-11 16:11:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-09-11 16:11:53,709 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-09-11 16:11:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:53,709 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-09-11 16:11:53,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:53,709 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-09-11 16:11:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:53,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:53,710 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:53,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-11 16:11:53,921 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:53,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:53,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 10 times [2020-09-11 16:11:53,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:53,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138588410] [2020-09-11 16:11:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:53,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138588410] [2020-09-11 16:11:53,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702550262] [2020-09-11 16:11:53,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:54,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:11:54,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:54,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:54,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:54,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:11:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:54,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:54,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:54,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412946271] [2020-09-11 16:11:54,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:54,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:54,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:54,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:54,164 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-09-11 16:11:54,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:54,377 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-11 16:11:54,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:11:54,378 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:54,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:54,379 INFO L225 Difference]: With dead ends: 133 [2020-09-11 16:11:54,379 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 16:11:54,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:11:54,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 16:11:54,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-09-11 16:11:54,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-11 16:11:54,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-09-11 16:11:54,384 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-09-11 16:11:54,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:54,384 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-09-11 16:11:54,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:54,384 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-09-11 16:11:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:54,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:54,385 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:54,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:54,595 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:54,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 11 times [2020-09-11 16:11:54,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:54,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755690349] [2020-09-11 16:11:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:54,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755690349] [2020-09-11 16:11:54,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012157472] [2020-09-11 16:11:54,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:54,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:54,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:54,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:54,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:54,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:54,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:54,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723732211] [2020-09-11 16:11:54,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:54,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:54,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:54,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:54,795 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-09-11 16:11:54,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:54,921 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-11 16:11:54,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:11:54,922 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:54,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:54,924 INFO L225 Difference]: With dead ends: 127 [2020-09-11 16:11:54,924 INFO L226 Difference]: Without dead ends: 125 [2020-09-11 16:11:54,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:11:54,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-11 16:11:54,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-09-11 16:11:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-11 16:11:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-11 16:11:54,928 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-11 16:11:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:54,928 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-11 16:11:54,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:54,929 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-11 16:11:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:54,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:54,929 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:55,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 16:11:55,139 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:55,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 12 times [2020-09-11 16:11:55,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:55,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186886281] [2020-09-11 16:11:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:55,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186886281] [2020-09-11 16:11:55,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717023479] [2020-09-11 16:11:55,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:55,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:11:55,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:55,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:55,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:55,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:11:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:55,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:55,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:55,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430753457] [2020-09-11 16:11:55,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:55,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:55,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:55,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:55,358 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-11 16:11:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:55,643 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-09-11 16:11:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:11:55,644 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:55,645 INFO L225 Difference]: With dead ends: 141 [2020-09-11 16:11:55,645 INFO L226 Difference]: Without dead ends: 136 [2020-09-11 16:11:55,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:11:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-11 16:11:55,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-09-11 16:11:55,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-11 16:11:55,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-11 16:11:55,652 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-11 16:11:55,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:55,652 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-11 16:11:55,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-11 16:11:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:55,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:55,654 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:55,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-11 16:11:55,854 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:55,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:55,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 13 times [2020-09-11 16:11:55,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:55,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831339585] [2020-09-11 16:11:55,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:55,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831339585] [2020-09-11 16:11:55,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842681845] [2020-09-11 16:11:55,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:56,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:56,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:56,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:11:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:56,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:56,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:56,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373792965] [2020-09-11 16:11:56,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:56,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:56,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:56,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:56,137 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-11 16:11:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:56,322 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-11 16:11:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:11:56,322 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:56,323 INFO L225 Difference]: With dead ends: 136 [2020-09-11 16:11:56,324 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 16:11:56,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:11:56,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 16:11:56,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-11 16:11:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 16:11:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-09-11 16:11:56,328 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-09-11 16:11:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:56,329 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-09-11 16:11:56,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-09-11 16:11:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:56,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:56,330 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:56,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 16:11:56,541 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:56,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:56,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 14 times [2020-09-11 16:11:56,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:56,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022534391] [2020-09-11 16:11:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:56,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022534391] [2020-09-11 16:11:56,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493324076] [2020-09-11 16:11:56,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:56,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:56,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:56,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:56,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:56,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:56,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:56,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010286701] [2020-09-11 16:11:56,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:56,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:56,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:56,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:56,744 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-09-11 16:11:56,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:56,902 INFO L93 Difference]: Finished difference Result 128 states and 297 transitions. [2020-09-11 16:11:56,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:11:56,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:56,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:56,904 INFO L225 Difference]: With dead ends: 128 [2020-09-11 16:11:56,904 INFO L226 Difference]: Without dead ends: 126 [2020-09-11 16:11:56,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:11:56,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-11 16:11:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-09-11 16:11:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 16:11:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-11 16:11:56,909 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-11 16:11:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:56,910 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-11 16:11:56,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:56,910 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-11 16:11:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:56,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:56,911 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:57,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-11 16:11:57,115 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:57,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 15 times [2020-09-11 16:11:57,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:57,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039215983] [2020-09-11 16:11:57,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:57,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039215983] [2020-09-11 16:11:57,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589673506] [2020-09-11 16:11:57,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:57,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:11:57,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:57,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:57,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:57,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:57,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014490675] [2020-09-11 16:11:57,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:57,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:57,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:57,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:57,326 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-11 16:11:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:57,617 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2020-09-11 16:11:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:11:57,618 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:57,619 INFO L225 Difference]: With dead ends: 126 [2020-09-11 16:11:57,619 INFO L226 Difference]: Without dead ends: 124 [2020-09-11 16:11:57,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:11:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-11 16:11:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2020-09-11 16:11:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 16:11:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-11 16:11:57,623 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-11 16:11:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:57,623 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-11 16:11:57,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-11 16:11:57,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:57,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:57,624 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:57,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 16:11:57,825 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:57,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 16 times [2020-09-11 16:11:57,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:57,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654819113] [2020-09-11 16:11:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:57,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654819113] [2020-09-11 16:11:57,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956102811] [2020-09-11 16:11:57,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:57,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:11:57,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:57,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:57,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:58,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:11:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:58,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:58,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:58,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162846453] [2020-09-11 16:11:58,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:58,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:58,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:58,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:58,021 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-11 16:11:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:58,284 INFO L93 Difference]: Finished difference Result 136 states and 323 transitions. [2020-09-11 16:11:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:11:58,284 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:58,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:58,285 INFO L225 Difference]: With dead ends: 136 [2020-09-11 16:11:58,285 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 16:11:58,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:11:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 16:11:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-11 16:11:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 16:11:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-11 16:11:58,291 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-11 16:11:58,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:58,292 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-11 16:11:58,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-11 16:11:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:58,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:58,293 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:58,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:58,503 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:58,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 17 times [2020-09-11 16:11:58,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:58,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899712623] [2020-09-11 16:11:58,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:58,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899712623] [2020-09-11 16:11:58,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331533120] [2020-09-11 16:11:58,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:58,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:58,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:58,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:58,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:58,680 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:11:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:58,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:58,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:58,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369003975] [2020-09-11 16:11:58,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:58,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:58,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:58,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:58,693 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-11 16:11:59,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:59,070 INFO L93 Difference]: Finished difference Result 138 states and 325 transitions. [2020-09-11 16:11:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:11:59,071 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:59,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:59,072 INFO L225 Difference]: With dead ends: 138 [2020-09-11 16:11:59,072 INFO L226 Difference]: Without dead ends: 133 [2020-09-11 16:11:59,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:11:59,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-11 16:11:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2020-09-11 16:11:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 16:11:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-11 16:11:59,076 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-11 16:11:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:59,077 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-11 16:11:59,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-11 16:11:59,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:59,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:59,078 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:59,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:59,279 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:59,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:59,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 18 times [2020-09-11 16:11:59,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:59,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294897787] [2020-09-11 16:11:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:59,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294897787] [2020-09-11 16:11:59,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105355228] [2020-09-11 16:11:59,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:59,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:11:59,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:59,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:59,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:59,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:11:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:11:59,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:59,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:59,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015994300] [2020-09-11 16:11:59,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:59,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:59,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:59,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:59,470 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-11 16:11:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:59,777 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-11 16:11:59,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:11:59,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:59,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:59,779 INFO L225 Difference]: With dead ends: 136 [2020-09-11 16:11:59,779 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 16:11:59,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:11:59,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 16:11:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 98. [2020-09-11 16:11:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-11 16:11:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-09-11 16:11:59,786 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-09-11 16:11:59,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:59,786 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-09-11 16:11:59,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-09-11 16:11:59,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:59,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:59,787 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:59,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:59,998 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:59,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:59,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-09-11 16:11:59,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:00,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209850785] [2020-09-11 16:12:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:00,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209850785] [2020-09-11 16:12:00,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733393115] [2020-09-11 16:12:00,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:00,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:00,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:00,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:00,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:00,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:00,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:00,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-09-11 16:12:00,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049350938] [2020-09-11 16:12:00,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:12:00,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:00,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:12:00,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:12:00,265 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-09-11 16:12:00,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:00,414 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-09-11 16:12:00,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:00,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-09-11 16:12:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:00,416 INFO L225 Difference]: With dead ends: 143 [2020-09-11 16:12:00,416 INFO L226 Difference]: Without dead ends: 138 [2020-09-11 16:12:00,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:12:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-11 16:12:00,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-09-11 16:12:00,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-11 16:12:00,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-09-11 16:12:00,420 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-09-11 16:12:00,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:00,421 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-09-11 16:12:00,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:12:00,421 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-09-11 16:12:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:12:00,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:00,421 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:00,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 16:12:00,631 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-09-11 16:12:00,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:00,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509217702] [2020-09-11 16:12:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:00,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509217702] [2020-09-11 16:12:00,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55564169] [2020-09-11 16:12:00,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:00,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:00,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:00,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:00,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:00,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:00,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:00,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745595439] [2020-09-11 16:12:00,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:00,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:00,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:00,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:00,891 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-09-11 16:12:01,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:01,034 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-11 16:12:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:12:01,040 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 16:12:01,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:01,041 INFO L225 Difference]: With dead ends: 134 [2020-09-11 16:12:01,041 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 16:12:01,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 16:12:01,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2020-09-11 16:12:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-11 16:12:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-11 16:12:01,046 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-11 16:12:01,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:01,046 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-11 16:12:01,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-11 16:12:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:12:01,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:01,047 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:01,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:01,257 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:01,258 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-09-11 16:12:01,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:01,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839413991] [2020-09-11 16:12:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:01,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839413991] [2020-09-11 16:12:01,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482459092] [2020-09-11 16:12:01,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:01,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:12:01,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:01,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:01,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:01,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:01,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:01,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866440594] [2020-09-11 16:12:01,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:01,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:01,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:01,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:01,505 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-11 16:12:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:01,711 INFO L93 Difference]: Finished difference Result 145 states and 336 transitions. [2020-09-11 16:12:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:01,712 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 16:12:01,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:01,714 INFO L225 Difference]: With dead ends: 145 [2020-09-11 16:12:01,714 INFO L226 Difference]: Without dead ends: 142 [2020-09-11 16:12:01,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:12:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-11 16:12:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2020-09-11 16:12:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-11 16:12:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-11 16:12:01,720 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-11 16:12:01,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:01,721 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-11 16:12:01,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-11 16:12:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:12:01,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:01,722 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:01,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 16:12:01,935 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:01,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:01,936 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-09-11 16:12:01,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:01,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020470905] [2020-09-11 16:12:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:02,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020470905] [2020-09-11 16:12:02,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730547091] [2020-09-11 16:12:02,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:02,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:12:02,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:02,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:02,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:02,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:02,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:02,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123774987] [2020-09-11 16:12:02,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:02,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:02,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:02,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:02,261 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-11 16:12:02,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:02,477 INFO L93 Difference]: Finished difference Result 147 states and 342 transitions. [2020-09-11 16:12:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:02,477 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 16:12:02,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:02,478 INFO L225 Difference]: With dead ends: 147 [2020-09-11 16:12:02,479 INFO L226 Difference]: Without dead ends: 144 [2020-09-11 16:12:02,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:12:02,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-11 16:12:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-09-11 16:12:02,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-11 16:12:02,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-09-11 16:12:02,483 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-09-11 16:12:02,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:02,483 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-09-11 16:12:02,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:02,483 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-09-11 16:12:02,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:12:02,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:02,484 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:02,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:02,693 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:02,694 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-09-11 16:12:02,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:02,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164598234] [2020-09-11 16:12:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:02,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164598234] [2020-09-11 16:12:02,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056154426] [2020-09-11 16:12:02,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:02,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:02,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:02,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:02,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:02,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039389485] [2020-09-11 16:12:02,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:02,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:02,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:02,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:02,944 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-09-11 16:12:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:03,153 INFO L93 Difference]: Finished difference Result 143 states and 336 transitions. [2020-09-11 16:12:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:03,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 16:12:03,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:03,155 INFO L225 Difference]: With dead ends: 143 [2020-09-11 16:12:03,155 INFO L226 Difference]: Without dead ends: 140 [2020-09-11 16:12:03,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:12:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-11 16:12:03,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-09-11 16:12:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-11 16:12:03,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-09-11 16:12:03,160 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-09-11 16:12:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:03,160 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-09-11 16:12:03,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:03,161 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-09-11 16:12:03,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:12:03,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:03,161 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:03,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 16:12:03,371 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:03,372 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-09-11 16:12:03,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:03,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301219184] [2020-09-11 16:12:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:03,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301219184] [2020-09-11 16:12:03,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801027924] [2020-09-11 16:12:03,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:03,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:03,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:03,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:03,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:03,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:03,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:03,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:03,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56275106] [2020-09-11 16:12:03,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:03,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:03,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:03,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:03,571 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-09-11 16:12:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:03,882 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-11 16:12:03,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:03,883 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 16:12:03,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:03,884 INFO L225 Difference]: With dead ends: 150 [2020-09-11 16:12:03,884 INFO L226 Difference]: Without dead ends: 144 [2020-09-11 16:12:03,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:12:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-11 16:12:03,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-09-11 16:12:03,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-11 16:12:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-09-11 16:12:03,889 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-09-11 16:12:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:03,889 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-09-11 16:12:03,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-09-11 16:12:03,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:03,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:03,890 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:04,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:04,101 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:04,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:04,102 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 19 times [2020-09-11 16:12:04,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:04,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648551582] [2020-09-11 16:12:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:04,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648551582] [2020-09-11 16:12:04,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25299957] [2020-09-11 16:12:04,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:04,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:04,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:04,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:04,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:04,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128817412] [2020-09-11 16:12:04,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:04,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:04,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:04,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:04,362 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-09-11 16:12:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:04,427 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-09-11 16:12:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:12:04,427 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:04,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:04,428 INFO L225 Difference]: With dead ends: 138 [2020-09-11 16:12:04,428 INFO L226 Difference]: Without dead ends: 136 [2020-09-11 16:12:04,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:04,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-11 16:12:04,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-09-11 16:12:04,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-11 16:12:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-09-11 16:12:04,433 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-09-11 16:12:04,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:04,433 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-09-11 16:12:04,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-09-11 16:12:04,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:04,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:04,434 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:04,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-11 16:12:04,645 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:04,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:04,646 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 20 times [2020-09-11 16:12:04,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:04,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611925408] [2020-09-11 16:12:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:04,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611925408] [2020-09-11 16:12:04,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525020985] [2020-09-11 16:12:04,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:04,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:04,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:04,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:04,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:04,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:04,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:04,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075851553] [2020-09-11 16:12:04,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:04,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:04,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:04,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:04,901 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-09-11 16:12:04,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:04,968 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-11 16:12:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:12:04,971 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:04,972 INFO L225 Difference]: With dead ends: 145 [2020-09-11 16:12:04,972 INFO L226 Difference]: Without dead ends: 143 [2020-09-11 16:12:04,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:12:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-11 16:12:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-11 16:12:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-11 16:12:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-09-11 16:12:04,976 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-09-11 16:12:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:04,977 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-09-11 16:12:04,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:04,977 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-09-11 16:12:04,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:04,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:04,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:05,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 16:12:05,186 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 21 times [2020-09-11 16:12:05,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:05,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654431651] [2020-09-11 16:12:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:05,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654431651] [2020-09-11 16:12:05,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754445318] [2020-09-11 16:12:05,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:05,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:12:05,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:05,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:05,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:05,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:05,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:05,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777463483] [2020-09-11 16:12:05,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:05,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:05,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:05,447 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-09-11 16:12:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:05,559 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-11 16:12:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:12:05,559 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:05,560 INFO L225 Difference]: With dead ends: 150 [2020-09-11 16:12:05,561 INFO L226 Difference]: Without dead ends: 148 [2020-09-11 16:12:05,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:12:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-11 16:12:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-09-11 16:12:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-11 16:12:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-09-11 16:12:05,565 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-09-11 16:12:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:05,565 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-09-11 16:12:05,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-09-11 16:12:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:05,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:05,566 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:05,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 16:12:05,777 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:05,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:05,778 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 22 times [2020-09-11 16:12:05,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:05,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637029434] [2020-09-11 16:12:05,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:05,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637029434] [2020-09-11 16:12:05,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256873923] [2020-09-11 16:12:05,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:05,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:05,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:05,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:05,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:06,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:06,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:06,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654922162] [2020-09-11 16:12:06,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:06,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:06,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:06,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:06,020 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-09-11 16:12:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:06,209 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-11 16:12:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:06,210 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:06,212 INFO L225 Difference]: With dead ends: 150 [2020-09-11 16:12:06,212 INFO L226 Difference]: Without dead ends: 148 [2020-09-11 16:12:06,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:12:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-11 16:12:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2020-09-11 16:12:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 16:12:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-11 16:12:06,216 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-11 16:12:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:06,216 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-11 16:12:06,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-11 16:12:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:06,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:06,217 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:06,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-11 16:12:06,427 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:06,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:06,428 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 23 times [2020-09-11 16:12:06,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:06,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281650402] [2020-09-11 16:12:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:06,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281650402] [2020-09-11 16:12:06,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383578066] [2020-09-11 16:12:06,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:06,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:06,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:06,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:06,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:06,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:06,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:06,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686046759] [2020-09-11 16:12:06,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:06,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:06,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:06,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:06,684 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-11 16:12:06,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:06,866 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-09-11 16:12:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:06,866 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:06,868 INFO L225 Difference]: With dead ends: 147 [2020-09-11 16:12:06,868 INFO L226 Difference]: Without dead ends: 145 [2020-09-11 16:12:06,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:12:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-11 16:12:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2020-09-11 16:12:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 16:12:06,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-09-11 16:12:06,875 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-09-11 16:12:06,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:06,875 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-09-11 16:12:06,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:06,875 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-09-11 16:12:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:06,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:06,876 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:07,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:07,077 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:07,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 24 times [2020-09-11 16:12:07,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:07,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847345728] [2020-09-11 16:12:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:07,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847345728] [2020-09-11 16:12:07,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324223172] [2020-09-11 16:12:07,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:07,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:07,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:07,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:07,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:07,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:07,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:07,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611514989] [2020-09-11 16:12:07,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:07,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:07,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:07,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:07,402 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-09-11 16:12:07,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:07,483 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-09-11 16:12:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:12:07,483 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:07,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:07,485 INFO L225 Difference]: With dead ends: 152 [2020-09-11 16:12:07,485 INFO L226 Difference]: Without dead ends: 150 [2020-09-11 16:12:07,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:12:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-11 16:12:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-09-11 16:12:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 16:12:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-09-11 16:12:07,495 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-09-11 16:12:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:07,495 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-09-11 16:12:07,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-09-11 16:12:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:07,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:07,496 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:07,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-09-11 16:12:07,697 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:07,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 25 times [2020-09-11 16:12:07,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:07,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102490708] [2020-09-11 16:12:07,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:07,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102490708] [2020-09-11 16:12:07,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403341827] [2020-09-11 16:12:07,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:07,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:07,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:07,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:07,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:07,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866342229] [2020-09-11 16:12:07,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:07,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:07,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:07,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:07,965 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-09-11 16:12:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:08,046 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-09-11 16:12:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:12:08,046 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:08,047 INFO L225 Difference]: With dead ends: 153 [2020-09-11 16:12:08,048 INFO L226 Difference]: Without dead ends: 151 [2020-09-11 16:12:08,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:08,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-11 16:12:08,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-09-11 16:12:08,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 16:12:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-11 16:12:08,053 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-11 16:12:08,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:08,053 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-11 16:12:08,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-11 16:12:08,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:08,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:08,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:08,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 16:12:08,265 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:08,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:08,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 26 times [2020-09-11 16:12:08,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:08,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492733611] [2020-09-11 16:12:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:08,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492733611] [2020-09-11 16:12:08,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794222072] [2020-09-11 16:12:08,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:08,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:08,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:08,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:08,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:08,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:08,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:08,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442158707] [2020-09-11 16:12:08,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:08,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:08,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:08,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:08,526 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-11 16:12:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:08,684 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-11 16:12:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:08,685 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:08,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:08,687 INFO L225 Difference]: With dead ends: 156 [2020-09-11 16:12:08,687 INFO L226 Difference]: Without dead ends: 154 [2020-09-11 16:12:08,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:12:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-11 16:12:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-09-11 16:12:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-11 16:12:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-09-11 16:12:08,692 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-09-11 16:12:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:08,692 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-09-11 16:12:08,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-09-11 16:12:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:08,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:08,693 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:08,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:08,903 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:08,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:08,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 27 times [2020-09-11 16:12:08,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:08,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630151112] [2020-09-11 16:12:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:09,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630151112] [2020-09-11 16:12:09,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670285158] [2020-09-11 16:12:09,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:09,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:12:09,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:09,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:09,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:09,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:09,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:09,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152860494] [2020-09-11 16:12:09,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:09,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:09,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:09,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:09,177 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-09-11 16:12:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:09,270 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-11 16:12:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:12:09,271 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:09,272 INFO L225 Difference]: With dead ends: 148 [2020-09-11 16:12:09,272 INFO L226 Difference]: Without dead ends: 146 [2020-09-11 16:12:09,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:09,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-11 16:12:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-09-11 16:12:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 16:12:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-11 16:12:09,277 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-11 16:12:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:09,277 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-11 16:12:09,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-11 16:12:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:09,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:09,278 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:09,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-11 16:12:09,488 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:09,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:09,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 28 times [2020-09-11 16:12:09,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:09,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005741659] [2020-09-11 16:12:09,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:09,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005741659] [2020-09-11 16:12:09,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435623415] [2020-09-11 16:12:09,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:09,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:09,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:09,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:09,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:09,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:09,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:09,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778870961] [2020-09-11 16:12:09,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:09,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:09,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:09,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:09,723 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-11 16:12:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:09,852 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2020-09-11 16:12:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:09,852 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:09,854 INFO L225 Difference]: With dead ends: 149 [2020-09-11 16:12:09,854 INFO L226 Difference]: Without dead ends: 147 [2020-09-11 16:12:09,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:12:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-11 16:12:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2020-09-11 16:12:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 16:12:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-09-11 16:12:09,859 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-09-11 16:12:09,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:09,859 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-09-11 16:12:09,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-09-11 16:12:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:09,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:09,860 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:10,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:10,072 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:10,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:10,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 29 times [2020-09-11 16:12:10,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:10,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995337375] [2020-09-11 16:12:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:10,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995337375] [2020-09-11 16:12:10,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304736981] [2020-09-11 16:12:10,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:10,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:10,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:10,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:10,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:10,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:10,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:10,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446588697] [2020-09-11 16:12:10,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:10,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:10,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:10,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:10,345 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-09-11 16:12:10,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:10,486 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-11 16:12:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:10,487 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:10,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:10,489 INFO L225 Difference]: With dead ends: 149 [2020-09-11 16:12:10,489 INFO L226 Difference]: Without dead ends: 147 [2020-09-11 16:12:10,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:12:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-11 16:12:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-09-11 16:12:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 16:12:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 16:12:10,495 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 16:12:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:10,496 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 16:12:10,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:10,496 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 16:12:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:10,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:10,497 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:10,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-11 16:12:10,710 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:10,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:10,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 30 times [2020-09-11 16:12:10,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:10,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227399639] [2020-09-11 16:12:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:10,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227399639] [2020-09-11 16:12:10,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504261788] [2020-09-11 16:12:10,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:10,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:10,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:10,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:10,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:10,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:10,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:10,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:10,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898129319] [2020-09-11 16:12:10,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:10,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:10,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:10,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:10,955 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 16:12:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:11,291 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-09-11 16:12:11,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:11,292 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:11,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:11,294 INFO L225 Difference]: With dead ends: 164 [2020-09-11 16:12:11,295 INFO L226 Difference]: Without dead ends: 159 [2020-09-11 16:12:11,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:12:11,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-11 16:12:11,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-11 16:12:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 16:12:11,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-09-11 16:12:11,299 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-09-11 16:12:11,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:11,299 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-09-11 16:12:11,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:11,300 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-09-11 16:12:11,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:11,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:11,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:11,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 16:12:11,511 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:11,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 31 times [2020-09-11 16:12:11,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:11,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067927912] [2020-09-11 16:12:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:11,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067927912] [2020-09-11 16:12:11,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445858328] [2020-09-11 16:12:11,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:11,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:11,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:11,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:11,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:11,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698566376] [2020-09-11 16:12:11,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:11,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:11,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:11,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:11,766 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-09-11 16:12:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:12,016 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-11 16:12:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:12,017 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:12,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:12,018 INFO L225 Difference]: With dead ends: 156 [2020-09-11 16:12:12,018 INFO L226 Difference]: Without dead ends: 154 [2020-09-11 16:12:12,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:12:12,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-11 16:12:12,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-09-11 16:12:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 16:12:12,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 16:12:12,022 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 16:12:12,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:12,022 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 16:12:12,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:12,022 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 16:12:12,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:12,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:12,023 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:12,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-11 16:12:12,226 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:12,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:12,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 32 times [2020-09-11 16:12:12,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:12,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261102926] [2020-09-11 16:12:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:12,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261102926] [2020-09-11 16:12:12,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333395277] [2020-09-11 16:12:12,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:12,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:12,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:12,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:12,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:12,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:12,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:12,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:12,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032037481] [2020-09-11 16:12:12,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:12,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:12,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:12,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:12,532 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 16:12:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:12,987 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-09-11 16:12:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:12:12,988 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:12,990 INFO L225 Difference]: With dead ends: 176 [2020-09-11 16:12:12,990 INFO L226 Difference]: Without dead ends: 171 [2020-09-11 16:12:12,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:12:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-11 16:12:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-11 16:12:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 16:12:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 16:12:12,995 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 16:12:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:12,995 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 16:12:12,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 16:12:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:12,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:12,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:13,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-11 16:12:13,197 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:13,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 33 times [2020-09-11 16:12:13,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:13,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997560379] [2020-09-11 16:12:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:13,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997560379] [2020-09-11 16:12:13,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449954154] [2020-09-11 16:12:13,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:13,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:12:13,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:13,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:13,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:13,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:13,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:13,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:13,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27444019] [2020-09-11 16:12:13,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:13,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:13,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:13,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:13,459 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 16:12:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:13,756 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-09-11 16:12:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:13,756 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:13,757 INFO L225 Difference]: With dead ends: 166 [2020-09-11 16:12:13,757 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 16:12:13,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:12:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 16:12:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-09-11 16:12:13,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 16:12:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-09-11 16:12:13,762 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-09-11 16:12:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:13,763 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-09-11 16:12:13,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-09-11 16:12:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:13,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:13,764 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:13,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:13,975 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:13,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:13,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 34 times [2020-09-11 16:12:13,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:13,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548351313] [2020-09-11 16:12:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:14,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548351313] [2020-09-11 16:12:14,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26274827] [2020-09-11 16:12:14,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:14,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:14,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:14,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:14,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:14,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:14,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:14,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533794030] [2020-09-11 16:12:14,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:14,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:14,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:14,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:14,213 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-09-11 16:12:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:14,451 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-09-11 16:12:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:14,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:14,453 INFO L225 Difference]: With dead ends: 163 [2020-09-11 16:12:14,454 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 16:12:14,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:12:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 16:12:14,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-09-11 16:12:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-11 16:12:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-09-11 16:12:14,457 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-09-11 16:12:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:14,459 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-09-11 16:12:14,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-09-11 16:12:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:14,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:14,460 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:14,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-09-11 16:12:14,670 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:14,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:14,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 35 times [2020-09-11 16:12:14,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:14,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667086036] [2020-09-11 16:12:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:14,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667086036] [2020-09-11 16:12:14,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881398338] [2020-09-11 16:12:14,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:14,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:14,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:14,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:14,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:14,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:14,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970454220] [2020-09-11 16:12:14,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:14,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:14,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:14,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:14,943 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-09-11 16:12:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:15,262 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-09-11 16:12:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:12:15,262 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:15,263 INFO L225 Difference]: With dead ends: 170 [2020-09-11 16:12:15,263 INFO L226 Difference]: Without dead ends: 168 [2020-09-11 16:12:15,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:12:15,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-11 16:12:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-09-11 16:12:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-11 16:12:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-09-11 16:12:15,268 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-09-11 16:12:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:15,268 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-09-11 16:12:15,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-09-11 16:12:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:15,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:15,269 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:15,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:15,473 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:15,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:15,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 36 times [2020-09-11 16:12:15,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:15,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901202032] [2020-09-11 16:12:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:15,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901202032] [2020-09-11 16:12:15,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731111231] [2020-09-11 16:12:15,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:15,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:15,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:15,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:15,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:15,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:15,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:15,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:15,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876893669] [2020-09-11 16:12:15,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:15,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:15,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:15,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:15,732 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-09-11 16:12:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:16,129 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-11 16:12:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:12:16,130 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:16,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:16,131 INFO L225 Difference]: With dead ends: 177 [2020-09-11 16:12:16,131 INFO L226 Difference]: Without dead ends: 172 [2020-09-11 16:12:16,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:12:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-11 16:12:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-09-11 16:12:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-11 16:12:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-09-11 16:12:16,136 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-09-11 16:12:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:16,136 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-09-11 16:12:16,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:16,136 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-09-11 16:12:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:16,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:16,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:16,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-09-11 16:12:16,348 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:16,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:16,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 37 times [2020-09-11 16:12:16,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:16,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899399149] [2020-09-11 16:12:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:16,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899399149] [2020-09-11 16:12:16,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422930500] [2020-09-11 16:12:16,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:16,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:16,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:16,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:16,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:16,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:16,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252756456] [2020-09-11 16:12:16,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:16,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:16,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:16,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:16,604 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-09-11 16:12:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:17,089 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-09-11 16:12:17,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:12:17,089 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:17,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:17,091 INFO L225 Difference]: With dead ends: 190 [2020-09-11 16:12:17,091 INFO L226 Difference]: Without dead ends: 182 [2020-09-11 16:12:17,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:12:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-11 16:12:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-09-11 16:12:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 16:12:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-09-11 16:12:17,095 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-09-11 16:12:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:17,096 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-09-11 16:12:17,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-09-11 16:12:17,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:17,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:17,097 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:17,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 16:12:17,297 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:17,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:17,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 38 times [2020-09-11 16:12:17,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:17,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754113952] [2020-09-11 16:12:17,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:17,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754113952] [2020-09-11 16:12:17,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523589830] [2020-09-11 16:12:17,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:17,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:17,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:17,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:17,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:17,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:17,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:17,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:17,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611524023] [2020-09-11 16:12:17,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:17,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:17,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:17,526 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-09-11 16:12:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:17,985 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-09-11 16:12:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:12:17,986 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:17,987 INFO L225 Difference]: With dead ends: 180 [2020-09-11 16:12:17,987 INFO L226 Difference]: Without dead ends: 175 [2020-09-11 16:12:17,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:12:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-11 16:12:17,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-11 16:12:17,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 16:12:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-09-11 16:12:17,990 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-09-11 16:12:17,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:17,991 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-09-11 16:12:17,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-09-11 16:12:17,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:17,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:17,992 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:18,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:18,200 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:18,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:18,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 39 times [2020-09-11 16:12:18,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:18,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474683914] [2020-09-11 16:12:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:18,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474683914] [2020-09-11 16:12:18,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031015477] [2020-09-11 16:12:18,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:18,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:12:18,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:18,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:18,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:18,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:18,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:18,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445908872] [2020-09-11 16:12:18,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:18,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:18,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:18,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:18,463 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-09-11 16:12:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:18,734 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-09-11 16:12:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:18,734 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:18,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:18,736 INFO L225 Difference]: With dead ends: 164 [2020-09-11 16:12:18,736 INFO L226 Difference]: Without dead ends: 162 [2020-09-11 16:12:18,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:12:18,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-11 16:12:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-09-11 16:12:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 16:12:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-09-11 16:12:18,742 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-09-11 16:12:18,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:18,742 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-09-11 16:12:18,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-09-11 16:12:18,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:18,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:18,743 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:18,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-11 16:12:18,946 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:18,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:18,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 40 times [2020-09-11 16:12:18,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:18,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758277589] [2020-09-11 16:12:18,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:19,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758277589] [2020-09-11 16:12:19,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614048271] [2020-09-11 16:12:19,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:19,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:19,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:19,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:19,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:19,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:19,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074834856] [2020-09-11 16:12:19,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:19,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:19,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:19,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:19,200 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-09-11 16:12:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:19,445 INFO L93 Difference]: Finished difference Result 159 states and 368 transitions. [2020-09-11 16:12:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:19,446 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:19,447 INFO L225 Difference]: With dead ends: 159 [2020-09-11 16:12:19,447 INFO L226 Difference]: Without dead ends: 157 [2020-09-11 16:12:19,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:12:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-11 16:12:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2020-09-11 16:12:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 16:12:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-09-11 16:12:19,450 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-09-11 16:12:19,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:19,451 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-09-11 16:12:19,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-09-11 16:12:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:19,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:19,452 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:19,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-11 16:12:19,653 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:19,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 41 times [2020-09-11 16:12:19,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:19,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023044625] [2020-09-11 16:12:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:19,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023044625] [2020-09-11 16:12:19,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294431404] [2020-09-11 16:12:19,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:19,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:12:19,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:19,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:19,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:19,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:19,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:19,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215246504] [2020-09-11 16:12:19,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:19,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:19,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:19,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:19,934 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-09-11 16:12:20,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:20,409 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2020-09-11 16:12:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:12:20,409 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:20,411 INFO L225 Difference]: With dead ends: 175 [2020-09-11 16:12:20,411 INFO L226 Difference]: Without dead ends: 173 [2020-09-11 16:12:20,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:12:20,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-11 16:12:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2020-09-11 16:12:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 16:12:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-09-11 16:12:20,417 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-09-11 16:12:20,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:20,417 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-09-11 16:12:20,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-09-11 16:12:20,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:20,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:20,419 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:20,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-11 16:12:20,631 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 42 times [2020-09-11 16:12:20,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:20,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693597893] [2020-09-11 16:12:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:20,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693597893] [2020-09-11 16:12:20,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675772114] [2020-09-11 16:12:20,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:20,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:20,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:20,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:20,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:20,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237934114] [2020-09-11 16:12:20,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:20,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:20,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:20,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:20,862 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-09-11 16:12:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:21,258 INFO L93 Difference]: Finished difference Result 162 states and 374 transitions. [2020-09-11 16:12:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:12:21,259 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:21,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:21,260 INFO L225 Difference]: With dead ends: 162 [2020-09-11 16:12:21,261 INFO L226 Difference]: Without dead ends: 160 [2020-09-11 16:12:21,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:12:21,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-11 16:12:21,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 118. [2020-09-11 16:12:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 16:12:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-11 16:12:21,265 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-11 16:12:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:21,265 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-11 16:12:21,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-11 16:12:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:21,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:21,266 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:21,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:21,478 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:21,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:21,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 43 times [2020-09-11 16:12:21,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:21,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867118678] [2020-09-11 16:12:21,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:21,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867118678] [2020-09-11 16:12:21,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224394772] [2020-09-11 16:12:21,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:21,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:21,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:21,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:21,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:21,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856086375] [2020-09-11 16:12:21,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:21,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:21,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:21,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:21,740 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-11 16:12:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:22,238 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-09-11 16:12:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:12:22,239 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:22,241 INFO L225 Difference]: With dead ends: 171 [2020-09-11 16:12:22,241 INFO L226 Difference]: Without dead ends: 169 [2020-09-11 16:12:22,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:12:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-11 16:12:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 120. [2020-09-11 16:12:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 16:12:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-11 16:12:22,245 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-11 16:12:22,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:22,245 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-11 16:12:22,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-11 16:12:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:22,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:22,246 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:22,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:22,456 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:22,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:22,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 44 times [2020-09-11 16:12:22,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:22,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453249175] [2020-09-11 16:12:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:22,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453249175] [2020-09-11 16:12:22,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467669225] [2020-09-11 16:12:22,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:22,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:22,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:22,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:22,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:22,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:22,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257541124] [2020-09-11 16:12:22,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:22,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:22,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:22,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:22,695 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-11 16:12:23,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:23,157 INFO L93 Difference]: Finished difference Result 165 states and 396 transitions. [2020-09-11 16:12:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:12:23,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:23,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:23,159 INFO L225 Difference]: With dead ends: 165 [2020-09-11 16:12:23,160 INFO L226 Difference]: Without dead ends: 160 [2020-09-11 16:12:23,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:12:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-11 16:12:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 121. [2020-09-11 16:12:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 16:12:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-11 16:12:23,162 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-11 16:12:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:23,163 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-11 16:12:23,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-11 16:12:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:23,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:23,163 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:23,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:23,364 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:23,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:23,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 45 times [2020-09-11 16:12:23,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:23,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888448689] [2020-09-11 16:12:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:23,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888448689] [2020-09-11 16:12:23,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736836038] [2020-09-11 16:12:23,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:23,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:12:23,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:23,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:23,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:23,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:23,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:23,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:23,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850198975] [2020-09-11 16:12:23,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:23,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:23,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:23,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:23,654 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-11 16:12:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:24,337 INFO L93 Difference]: Finished difference Result 194 states and 461 transitions. [2020-09-11 16:12:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:12:24,338 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:24,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:24,340 INFO L225 Difference]: With dead ends: 194 [2020-09-11 16:12:24,340 INFO L226 Difference]: Without dead ends: 186 [2020-09-11 16:12:24,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:12:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-11 16:12:24,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 118. [2020-09-11 16:12:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 16:12:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-11 16:12:24,344 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-11 16:12:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:24,344 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-11 16:12:24,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:24,345 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-11 16:12:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:24,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:24,345 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:24,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:24,546 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:24,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:24,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 46 times [2020-09-11 16:12:24,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:24,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933991504] [2020-09-11 16:12:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:24,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933991504] [2020-09-11 16:12:24,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467794500] [2020-09-11 16:12:24,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:24,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:24,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:24,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:24,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:24,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:24,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:24,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065256422] [2020-09-11 16:12:24,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:24,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:24,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:24,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:24,796 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-11 16:12:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:25,269 INFO L93 Difference]: Finished difference Result 168 states and 393 transitions. [2020-09-11 16:12:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:12:25,270 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:25,272 INFO L225 Difference]: With dead ends: 168 [2020-09-11 16:12:25,272 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 16:12:25,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:12:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 16:12:25,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-09-11 16:12:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 16:12:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-11 16:12:25,276 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-11 16:12:25,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:25,276 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-11 16:12:25,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:25,277 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-11 16:12:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:25,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:25,277 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:25,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-11 16:12:25,478 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:25,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 47 times [2020-09-11 16:12:25,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:25,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691079077] [2020-09-11 16:12:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:25,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691079077] [2020-09-11 16:12:25,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33049985] [2020-09-11 16:12:25,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:25,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:25,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:25,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:25,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:25,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:25,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:25,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:25,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064316157] [2020-09-11 16:12:25,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:25,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:25,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:25,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:25,719 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-11 16:12:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:26,323 INFO L93 Difference]: Finished difference Result 181 states and 430 transitions. [2020-09-11 16:12:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:12:26,324 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:26,325 INFO L225 Difference]: With dead ends: 181 [2020-09-11 16:12:26,325 INFO L226 Difference]: Without dead ends: 173 [2020-09-11 16:12:26,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:12:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-11 16:12:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 119. [2020-09-11 16:12:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-11 16:12:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-09-11 16:12:26,329 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-09-11 16:12:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:26,329 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-09-11 16:12:26,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:26,329 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-09-11 16:12:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:26,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:26,330 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:26,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:26,540 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:26,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:26,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 48 times [2020-09-11 16:12:26,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:26,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195353167] [2020-09-11 16:12:26,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:26,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195353167] [2020-09-11 16:12:26,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411844218] [2020-09-11 16:12:26,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:26,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:26,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:26,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:26,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:26,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:26,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:26,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:26,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530544646] [2020-09-11 16:12:26,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:26,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:26,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:26,772 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-09-11 16:12:27,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:27,411 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-09-11 16:12:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:12:27,411 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:27,413 INFO L225 Difference]: With dead ends: 171 [2020-09-11 16:12:27,413 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 16:12:27,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:12:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 16:12:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2020-09-11 16:12:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-11 16:12:27,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-09-11 16:12:27,418 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-09-11 16:12:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:27,418 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-09-11 16:12:27,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-09-11 16:12:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:27,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:27,419 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:27,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-11 16:12:27,620 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:27,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:27,620 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-09-11 16:12:27,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:27,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133540368] [2020-09-11 16:12:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:27,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133540368] [2020-09-11 16:12:27,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766324634] [2020-09-11 16:12:27,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:27,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:12:27,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:27,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:27,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:27,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:27,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:27,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-11 16:12:27,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127899491] [2020-09-11 16:12:27,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:12:27,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:27,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:12:27,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:12:27,964 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-09-11 16:12:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:28,142 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-09-11 16:12:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:28,143 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-09-11 16:12:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:28,144 INFO L225 Difference]: With dead ends: 164 [2020-09-11 16:12:28,144 INFO L226 Difference]: Without dead ends: 159 [2020-09-11 16:12:28,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:12:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-11 16:12:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-11 16:12:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 16:12:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-09-11 16:12:28,147 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-09-11 16:12:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:28,148 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-09-11 16:12:28,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:12:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-09-11 16:12:28,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:28,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:28,149 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:28,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:28,350 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:28,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:28,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-09-11 16:12:28,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:28,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917919973] [2020-09-11 16:12:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:28,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917919973] [2020-09-11 16:12:28,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275183437] [2020-09-11 16:12:28,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:28,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:12:28,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:28,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:28,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:28,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:28,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:28,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987451797] [2020-09-11 16:12:28,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:28,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:28,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:28,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:28,661 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-09-11 16:12:28,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:28,860 INFO L93 Difference]: Finished difference Result 158 states and 371 transitions. [2020-09-11 16:12:28,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:28,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 16:12:28,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:28,862 INFO L225 Difference]: With dead ends: 158 [2020-09-11 16:12:28,862 INFO L226 Difference]: Without dead ends: 155 [2020-09-11 16:12:28,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:12:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-11 16:12:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2020-09-11 16:12:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-11 16:12:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-11 16:12:28,866 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-11 16:12:28,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:28,866 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-11 16:12:28,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-11 16:12:28,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:28,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:28,867 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:29,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-11 16:12:29,069 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:29,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:29,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-09-11 16:12:29,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:29,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102490663] [2020-09-11 16:12:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:29,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102490663] [2020-09-11 16:12:29,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442427892] [2020-09-11 16:12:29,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:29,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:29,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:29,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:29,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:29,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:29,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083355565] [2020-09-11 16:12:29,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:29,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:29,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:29,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:29,394 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-11 16:12:29,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:29,664 INFO L93 Difference]: Finished difference Result 172 states and 398 transitions. [2020-09-11 16:12:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:29,665 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 16:12:29,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:29,666 INFO L225 Difference]: With dead ends: 172 [2020-09-11 16:12:29,666 INFO L226 Difference]: Without dead ends: 169 [2020-09-11 16:12:29,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:12:29,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-11 16:12:29,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 129. [2020-09-11 16:12:29,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-11 16:12:29,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-11 16:12:29,671 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-11 16:12:29,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:29,671 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-11 16:12:29,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:29,671 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-11 16:12:29,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:29,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:29,672 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:29,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:29,873 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-09-11 16:12:29,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:29,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524445636] [2020-09-11 16:12:29,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:29,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524445636] [2020-09-11 16:12:29,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622659415] [2020-09-11 16:12:29,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:30,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:12:30,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:30,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:30,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:30,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:30,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:30,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958645031] [2020-09-11 16:12:30,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:30,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:30,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:30,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:30,185 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-11 16:12:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:30,534 INFO L93 Difference]: Finished difference Result 177 states and 410 transitions. [2020-09-11 16:12:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:12:30,535 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 16:12:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:30,537 INFO L225 Difference]: With dead ends: 177 [2020-09-11 16:12:30,537 INFO L226 Difference]: Without dead ends: 174 [2020-09-11 16:12:30,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:12:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-11 16:12:30,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 130. [2020-09-11 16:12:30,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-11 16:12:30,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-09-11 16:12:30,541 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-09-11 16:12:30,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:30,541 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-09-11 16:12:30,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:30,541 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-09-11 16:12:30,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:30,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:30,543 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:30,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:30,750 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:30,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-09-11 16:12:30,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:30,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879989865] [2020-09-11 16:12:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:30,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879989865] [2020-09-11 16:12:30,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040395237] [2020-09-11 16:12:30,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:30,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:12:30,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:30,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:30,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:31,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:31,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:31,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788652873] [2020-09-11 16:12:31,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:31,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:31,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:31,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:31,037 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-09-11 16:12:31,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:31,419 INFO L93 Difference]: Finished difference Result 176 states and 410 transitions. [2020-09-11 16:12:31,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:12:31,420 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 16:12:31,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:31,421 INFO L225 Difference]: With dead ends: 176 [2020-09-11 16:12:31,422 INFO L226 Difference]: Without dead ends: 173 [2020-09-11 16:12:31,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:12:31,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-11 16:12:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 132. [2020-09-11 16:12:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-11 16:12:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-09-11 16:12:31,425 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-09-11 16:12:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:31,426 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-09-11 16:12:31,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-09-11 16:12:31,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:31,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:31,427 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:31,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-09-11 16:12:31,637 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:31,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:31,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-09-11 16:12:31,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:31,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792993422] [2020-09-11 16:12:31,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:31,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792993422] [2020-09-11 16:12:31,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677380419] [2020-09-11 16:12:31,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:31,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:31,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:31,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:31,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:31,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954825658] [2020-09-11 16:12:31,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:31,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:31,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:31,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:31,939 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-09-11 16:12:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:32,276 INFO L93 Difference]: Finished difference Result 169 states and 398 transitions. [2020-09-11 16:12:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:32,277 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 16:12:32,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:32,279 INFO L225 Difference]: With dead ends: 169 [2020-09-11 16:12:32,279 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 16:12:32,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:12:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 16:12:32,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 134. [2020-09-11 16:12:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-11 16:12:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-09-11 16:12:32,283 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-09-11 16:12:32,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:32,283 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-09-11 16:12:32,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-09-11 16:12:32,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:32,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:32,284 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:32,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:32,485 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:32,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:32,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-09-11 16:12:32,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:32,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325209249] [2020-09-11 16:12:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:32,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325209249] [2020-09-11 16:12:32,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126292974] [2020-09-11 16:12:32,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:32,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:32,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:32,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:32,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:32,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:32,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:32,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:32,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269301258] [2020-09-11 16:12:32,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:32,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:32,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:32,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:32,772 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-09-11 16:12:33,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:33,184 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-09-11 16:12:33,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:33,185 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 16:12:33,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:33,187 INFO L225 Difference]: With dead ends: 176 [2020-09-11 16:12:33,187 INFO L226 Difference]: Without dead ends: 170 [2020-09-11 16:12:33,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:12:33,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-11 16:12:33,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-09-11 16:12:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-11 16:12:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-09-11 16:12:33,191 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-09-11 16:12:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:33,191 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-09-11 16:12:33,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-09-11 16:12:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:33,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:33,192 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:33,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:33,393 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:33,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:33,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 49 times [2020-09-11 16:12:33,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:33,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894417027] [2020-09-11 16:12:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:33,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894417027] [2020-09-11 16:12:33,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224371927] [2020-09-11 16:12:33,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:33,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:33,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:33,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:33,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:33,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749346771] [2020-09-11 16:12:33,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:33,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:33,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:33,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:33,718 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-09-11 16:12:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:33,774 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-09-11 16:12:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:12:33,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:33,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:33,776 INFO L225 Difference]: With dead ends: 163 [2020-09-11 16:12:33,776 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 16:12:33,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:33,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 16:12:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-09-11 16:12:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-11 16:12:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-09-11 16:12:33,780 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-09-11 16:12:33,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:33,780 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-09-11 16:12:33,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-09-11 16:12:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:33,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:33,781 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:33,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-11 16:12:33,982 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:33,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:33,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 50 times [2020-09-11 16:12:33,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:33,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272663718] [2020-09-11 16:12:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:34,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272663718] [2020-09-11 16:12:34,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274939357] [2020-09-11 16:12:34,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:34,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:34,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:34,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:34,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:34,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:34,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870016955] [2020-09-11 16:12:34,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:34,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:34,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:34,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:34,301 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-09-11 16:12:34,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:34,406 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-09-11 16:12:34,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:12:34,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:34,408 INFO L225 Difference]: With dead ends: 172 [2020-09-11 16:12:34,408 INFO L226 Difference]: Without dead ends: 170 [2020-09-11 16:12:34,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:12:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-11 16:12:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-09-11 16:12:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 16:12:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-11 16:12:34,412 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-11 16:12:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:34,412 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-11 16:12:34,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-11 16:12:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:34,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:34,413 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:34,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:34,614 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:34,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 51 times [2020-09-11 16:12:34,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:34,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13863192] [2020-09-11 16:12:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:34,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13863192] [2020-09-11 16:12:34,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582071773] [2020-09-11 16:12:34,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:34,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:12:34,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:34,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:34,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:35,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:35,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:35,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730115829] [2020-09-11 16:12:35,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:35,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:35,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:35,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:35,009 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-11 16:12:35,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:35,217 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-11 16:12:35,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:35,219 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:35,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:35,220 INFO L225 Difference]: With dead ends: 179 [2020-09-11 16:12:35,221 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 16:12:35,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:12:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 16:12:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-09-11 16:12:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-11 16:12:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-09-11 16:12:35,227 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-09-11 16:12:35,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:35,227 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-09-11 16:12:35,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-09-11 16:12:35,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:35,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:35,229 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:35,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-11 16:12:35,431 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:35,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 52 times [2020-09-11 16:12:35,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:35,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733491614] [2020-09-11 16:12:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:35,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733491614] [2020-09-11 16:12:35,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237824017] [2020-09-11 16:12:35,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:35,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:35,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:35,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:35,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:35,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:35,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:35,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571636108] [2020-09-11 16:12:35,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:35,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:35,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:35,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:35,822 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-09-11 16:12:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:36,084 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-11 16:12:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:36,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:36,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:36,087 INFO L225 Difference]: With dead ends: 179 [2020-09-11 16:12:36,088 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 16:12:36,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:12:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 16:12:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-09-11 16:12:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 16:12:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-11 16:12:36,093 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-11 16:12:36,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:36,094 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-11 16:12:36,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:36,094 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-11 16:12:36,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:36,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:36,095 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:36,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-09-11 16:12:36,308 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:36,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 53 times [2020-09-11 16:12:36,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:36,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706843904] [2020-09-11 16:12:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:36,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706843904] [2020-09-11 16:12:36,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392427258] [2020-09-11 16:12:36,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:36,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:36,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:36,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:36,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:36,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:36,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:36,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580659964] [2020-09-11 16:12:36,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:36,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:36,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:36,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:36,632 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-11 16:12:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:36,867 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-09-11 16:12:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:36,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:36,869 INFO L225 Difference]: With dead ends: 184 [2020-09-11 16:12:36,869 INFO L226 Difference]: Without dead ends: 182 [2020-09-11 16:12:36,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:12:36,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-11 16:12:36,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-09-11 16:12:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 16:12:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-09-11 16:12:36,880 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-09-11 16:12:36,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:36,880 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-09-11 16:12:36,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-09-11 16:12:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:36,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:36,881 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:37,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-11 16:12:37,089 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:37,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 54 times [2020-09-11 16:12:37,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:37,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063471375] [2020-09-11 16:12:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:37,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063471375] [2020-09-11 16:12:37,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402468874] [2020-09-11 16:12:37,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:37,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:12:37,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:37,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:37,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:37,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:37,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:37,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605129871] [2020-09-11 16:12:37,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:37,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:37,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:37,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:37,404 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-09-11 16:12:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:37,666 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-09-11 16:12:37,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:37,667 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:37,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:37,668 INFO L225 Difference]: With dead ends: 179 [2020-09-11 16:12:37,668 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 16:12:37,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:12:37,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 16:12:37,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-09-11 16:12:37,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-11 16:12:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-09-11 16:12:37,672 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-09-11 16:12:37,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:37,672 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-09-11 16:12:37,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-09-11 16:12:37,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:37,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:37,673 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:37,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:37,873 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:37,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:37,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 55 times [2020-09-11 16:12:37,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:37,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740371378] [2020-09-11 16:12:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:37,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740371378] [2020-09-11 16:12:37,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041538028] [2020-09-11 16:12:37,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:38,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:38,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:38,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:38,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:38,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080229699] [2020-09-11 16:12:38,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:38,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:38,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:38,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:38,188 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-09-11 16:12:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:38,508 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-11 16:12:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:38,509 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:38,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:38,510 INFO L225 Difference]: With dead ends: 177 [2020-09-11 16:12:38,511 INFO L226 Difference]: Without dead ends: 175 [2020-09-11 16:12:38,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:12:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-11 16:12:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2020-09-11 16:12:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 16:12:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-09-11 16:12:38,516 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-09-11 16:12:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:38,516 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-09-11 16:12:38,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:38,516 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-09-11 16:12:38,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:38,517 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:38,517 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:38,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:38,718 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:38,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:38,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 56 times [2020-09-11 16:12:38,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:38,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573803505] [2020-09-11 16:12:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:38,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573803505] [2020-09-11 16:12:38,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487418143] [2020-09-11 16:12:38,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:38,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:38,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:38,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:38,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:39,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:39,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:39,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588781465] [2020-09-11 16:12:39,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:39,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:39,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:39,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:39,069 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-09-11 16:12:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:39,415 INFO L93 Difference]: Finished difference Result 187 states and 443 transitions. [2020-09-11 16:12:39,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:39,416 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:39,417 INFO L225 Difference]: With dead ends: 187 [2020-09-11 16:12:39,418 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 16:12:39,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:12:39,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 16:12:39,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-09-11 16:12:39,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 16:12:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-09-11 16:12:39,422 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-09-11 16:12:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:39,422 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-09-11 16:12:39,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-09-11 16:12:39,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:39,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:39,423 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:39,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:39,634 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:39,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 57 times [2020-09-11 16:12:39,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:39,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309572955] [2020-09-11 16:12:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:39,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309572955] [2020-09-11 16:12:39,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913962978] [2020-09-11 16:12:39,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:39,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:12:39,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:39,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:39,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:39,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:39,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:39,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767083140] [2020-09-11 16:12:39,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:39,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:39,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:39,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:39,936 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-09-11 16:12:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:40,234 INFO L93 Difference]: Finished difference Result 181 states and 433 transitions. [2020-09-11 16:12:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:40,235 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:40,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:40,236 INFO L225 Difference]: With dead ends: 181 [2020-09-11 16:12:40,237 INFO L226 Difference]: Without dead ends: 179 [2020-09-11 16:12:40,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:12:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-11 16:12:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 138. [2020-09-11 16:12:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-11 16:12:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-09-11 16:12:40,240 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-09-11 16:12:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:40,240 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-09-11 16:12:40,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-09-11 16:12:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:40,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:40,241 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:40,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:40,442 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:40,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:40,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 58 times [2020-09-11 16:12:40,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:40,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975609353] [2020-09-11 16:12:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:40,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975609353] [2020-09-11 16:12:40,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832986351] [2020-09-11 16:12:40,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:40,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:40,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:40,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:40,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:40,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:40,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:40,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141039128] [2020-09-11 16:12:40,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:40,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:40,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:40,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:40,817 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-09-11 16:12:40,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:40,898 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-09-11 16:12:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:12:40,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:40,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:40,901 INFO L225 Difference]: With dead ends: 182 [2020-09-11 16:12:40,901 INFO L226 Difference]: Without dead ends: 180 [2020-09-11 16:12:40,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:12:40,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-11 16:12:40,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-09-11 16:12:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 16:12:40,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-09-11 16:12:40,904 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-09-11 16:12:40,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:40,904 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-09-11 16:12:40,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:40,905 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-09-11 16:12:40,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:40,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:40,905 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:41,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-09-11 16:12:41,115 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:41,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:41,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 59 times [2020-09-11 16:12:41,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:41,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858292007] [2020-09-11 16:12:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:41,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858292007] [2020-09-11 16:12:41,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134252264] [2020-09-11 16:12:41,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:41,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:41,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:41,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:41,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:41,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:41,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:41,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149079446] [2020-09-11 16:12:41,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:41,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:41,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:41,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:41,479 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-09-11 16:12:41,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:41,589 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-09-11 16:12:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:41,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:41,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:41,592 INFO L225 Difference]: With dead ends: 185 [2020-09-11 16:12:41,592 INFO L226 Difference]: Without dead ends: 183 [2020-09-11 16:12:41,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:12:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-11 16:12:41,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-09-11 16:12:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:12:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-11 16:12:41,601 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-11 16:12:41,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:41,602 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-11 16:12:41,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:41,602 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-11 16:12:41,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:41,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:41,603 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:41,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:41,804 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:41,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:41,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 60 times [2020-09-11 16:12:41,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:41,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363866401] [2020-09-11 16:12:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:41,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363866401] [2020-09-11 16:12:41,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006833188] [2020-09-11 16:12:41,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:41,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:41,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:41,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:41,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:42,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:42,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:42,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393817483] [2020-09-11 16:12:42,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:42,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:42,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:42,209 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-11 16:12:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:42,418 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-09-11 16:12:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:42,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:42,421 INFO L225 Difference]: With dead ends: 191 [2020-09-11 16:12:42,421 INFO L226 Difference]: Without dead ends: 189 [2020-09-11 16:12:42,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:12:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-11 16:12:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-09-11 16:12:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 16:12:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-09-11 16:12:42,425 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-09-11 16:12:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:42,426 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-09-11 16:12:42,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-09-11 16:12:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:42,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:42,427 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:42,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:42,632 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:42,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:42,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 61 times [2020-09-11 16:12:42,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:42,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296932372] [2020-09-11 16:12:42,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:42,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296932372] [2020-09-11 16:12:42,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052404069] [2020-09-11 16:12:42,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:42,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:42,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:42,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:42,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:42,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302716395] [2020-09-11 16:12:42,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:42,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:42,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:42,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:42,965 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-09-11 16:12:43,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:43,206 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-09-11 16:12:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:43,207 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:43,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:43,209 INFO L225 Difference]: With dead ends: 187 [2020-09-11 16:12:43,209 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 16:12:43,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:12:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 16:12:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-09-11 16:12:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:12:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-11 16:12:43,213 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-11 16:12:43,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:43,213 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-11 16:12:43,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-11 16:12:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:43,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:43,215 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:43,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:43,416 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 62 times [2020-09-11 16:12:43,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:43,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037381531] [2020-09-11 16:12:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:43,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037381531] [2020-09-11 16:12:43,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548573481] [2020-09-11 16:12:43,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:43,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:43,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:43,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:43,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:43,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:43,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:43,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644001477] [2020-09-11 16:12:43,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:43,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:43,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:43,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:43,764 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-11 16:12:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:43,997 INFO L93 Difference]: Finished difference Result 194 states and 455 transitions. [2020-09-11 16:12:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:43,998 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:43,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:44,000 INFO L225 Difference]: With dead ends: 194 [2020-09-11 16:12:44,000 INFO L226 Difference]: Without dead ends: 192 [2020-09-11 16:12:44,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:12:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-11 16:12:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 142. [2020-09-11 16:12:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:12:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-09-11 16:12:44,005 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-09-11 16:12:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:44,005 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-09-11 16:12:44,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-09-11 16:12:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:44,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:44,006 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:44,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:44,216 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:44,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 63 times [2020-09-11 16:12:44,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:44,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757207131] [2020-09-11 16:12:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:44,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757207131] [2020-09-11 16:12:44,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808145253] [2020-09-11 16:12:44,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:44,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:12:44,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:44,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:44,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:44,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:44,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:44,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753919018] [2020-09-11 16:12:44,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:44,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:44,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:44,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:44,551 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-09-11 16:12:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:44,823 INFO L93 Difference]: Finished difference Result 186 states and 443 transitions. [2020-09-11 16:12:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:44,826 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:44,827 INFO L225 Difference]: With dead ends: 186 [2020-09-11 16:12:44,827 INFO L226 Difference]: Without dead ends: 184 [2020-09-11 16:12:44,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:12:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-11 16:12:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 139. [2020-09-11 16:12:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 16:12:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-09-11 16:12:44,830 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-09-11 16:12:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:44,831 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-09-11 16:12:44,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-09-11 16:12:44,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:44,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:44,831 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:45,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-11 16:12:45,032 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:45,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 64 times [2020-09-11 16:12:45,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:45,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990860589] [2020-09-11 16:12:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:45,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990860589] [2020-09-11 16:12:45,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316485754] [2020-09-11 16:12:45,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:45,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:45,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:45,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:45,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:45,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:45,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:45,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609299618] [2020-09-11 16:12:45,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:45,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:45,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:45,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:45,388 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-09-11 16:12:45,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:45,502 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-09-11 16:12:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:45,503 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:45,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:45,505 INFO L225 Difference]: With dead ends: 178 [2020-09-11 16:12:45,505 INFO L226 Difference]: Without dead ends: 176 [2020-09-11 16:12:45,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:12:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-11 16:12:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-09-11 16:12:45,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 16:12:45,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-09-11 16:12:45,508 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-09-11 16:12:45,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:45,508 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-09-11 16:12:45,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:45,508 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-09-11 16:12:45,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:45,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:45,509 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:45,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-11 16:12:45,717 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:45,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:45,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 65 times [2020-09-11 16:12:45,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:45,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834011445] [2020-09-11 16:12:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:45,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834011445] [2020-09-11 16:12:45,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126030840] [2020-09-11 16:12:45,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:45,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:45,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:45,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:45,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:46,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:46,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:46,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746360] [2020-09-11 16:12:46,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:46,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:46,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:46,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:46,062 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-09-11 16:12:46,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:46,207 INFO L93 Difference]: Finished difference Result 181 states and 428 transitions. [2020-09-11 16:12:46,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:46,208 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:46,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:46,210 INFO L225 Difference]: With dead ends: 181 [2020-09-11 16:12:46,210 INFO L226 Difference]: Without dead ends: 179 [2020-09-11 16:12:46,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:12:46,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-11 16:12:46,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2020-09-11 16:12:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 16:12:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-09-11 16:12:46,215 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-09-11 16:12:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:46,216 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-09-11 16:12:46,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-09-11 16:12:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:46,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:46,216 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:46,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:46,417 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:46,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:46,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 66 times [2020-09-11 16:12:46,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:46,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24646033] [2020-09-11 16:12:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:46,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24646033] [2020-09-11 16:12:46,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167476452] [2020-09-11 16:12:46,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:46,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:46,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:46,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:46,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:46,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:46,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076411330] [2020-09-11 16:12:46,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:46,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:46,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:46,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:46,807 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-09-11 16:12:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:47,045 INFO L93 Difference]: Finished difference Result 187 states and 440 transitions. [2020-09-11 16:12:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:47,046 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:47,048 INFO L225 Difference]: With dead ends: 187 [2020-09-11 16:12:47,048 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 16:12:47,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:12:47,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 16:12:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-09-11 16:12:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 16:12:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-09-11 16:12:47,052 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-09-11 16:12:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:47,052 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-09-11 16:12:47,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-09-11 16:12:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:47,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:47,053 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:47,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:47,255 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:47,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:47,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 67 times [2020-09-11 16:12:47,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:47,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511975326] [2020-09-11 16:12:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:47,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511975326] [2020-09-11 16:12:47,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089892414] [2020-09-11 16:12:47,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:47,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:47,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:47,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:47,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:47,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612035454] [2020-09-11 16:12:47,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:47,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:47,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:47,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:47,571 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-09-11 16:12:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:47,716 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-09-11 16:12:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:47,717 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:47,718 INFO L225 Difference]: With dead ends: 174 [2020-09-11 16:12:47,718 INFO L226 Difference]: Without dead ends: 172 [2020-09-11 16:12:47,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:12:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-11 16:12:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-09-11 16:12:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:12:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-09-11 16:12:47,722 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-09-11 16:12:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:47,722 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-09-11 16:12:47,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-09-11 16:12:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:47,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:47,723 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:47,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:47,924 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:47,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 68 times [2020-09-11 16:12:47,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:47,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686464803] [2020-09-11 16:12:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:48,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686464803] [2020-09-11 16:12:48,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297304000] [2020-09-11 16:12:48,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:48,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:48,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:48,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:48,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:48,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:48,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:48,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778383536] [2020-09-11 16:12:48,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:48,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:48,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:48,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:48,254 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-09-11 16:12:48,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:48,443 INFO L93 Difference]: Finished difference Result 177 states and 419 transitions. [2020-09-11 16:12:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:48,444 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:48,446 INFO L225 Difference]: With dead ends: 177 [2020-09-11 16:12:48,446 INFO L226 Difference]: Without dead ends: 175 [2020-09-11 16:12:48,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:12:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-11 16:12:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 141. [2020-09-11 16:12:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 16:12:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-09-11 16:12:48,450 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-09-11 16:12:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:48,450 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-09-11 16:12:48,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:48,450 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-09-11 16:12:48,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:48,450 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:48,450 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:48,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:48,652 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:48,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 69 times [2020-09-11 16:12:48,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:48,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912510707] [2020-09-11 16:12:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:48,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912510707] [2020-09-11 16:12:48,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484177670] [2020-09-11 16:12:48,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:48,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:12:48,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:48,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:48,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:48,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:48,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:48,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258771105] [2020-09-11 16:12:48,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:48,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:48,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:48,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:48,974 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-09-11 16:12:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:49,154 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-09-11 16:12:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:49,154 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:49,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:49,156 INFO L225 Difference]: With dead ends: 175 [2020-09-11 16:12:49,156 INFO L226 Difference]: Without dead ends: 173 [2020-09-11 16:12:49,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:12:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-11 16:12:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-09-11 16:12:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 16:12:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 16:12:49,161 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 16:12:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:49,161 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 16:12:49,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 16:12:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:49,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:49,162 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:49,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:49,372 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:49,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:49,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 70 times [2020-09-11 16:12:49,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:49,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794505565] [2020-09-11 16:12:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:49,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794505565] [2020-09-11 16:12:49,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344760512] [2020-09-11 16:12:49,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:49,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:49,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:49,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:49,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:49,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:49,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:49,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:49,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152517606] [2020-09-11 16:12:49,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:49,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:49,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:49,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:49,706 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 16:12:50,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:50,157 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-09-11 16:12:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:50,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:50,161 INFO L225 Difference]: With dead ends: 195 [2020-09-11 16:12:50,161 INFO L226 Difference]: Without dead ends: 190 [2020-09-11 16:12:50,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:12:50,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-11 16:12:50,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-09-11 16:12:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 16:12:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-11 16:12:50,164 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-11 16:12:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:50,164 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-11 16:12:50,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-11 16:12:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:50,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:50,165 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:50,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:50,368 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:50,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 71 times [2020-09-11 16:12:50,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:50,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775245935] [2020-09-11 16:12:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:50,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775245935] [2020-09-11 16:12:50,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946709345] [2020-09-11 16:12:50,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:50,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:50,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:50,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:50,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:50,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:50,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:50,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374943444] [2020-09-11 16:12:50,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:50,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:50,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:50,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:50,705 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-11 16:12:51,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:51,059 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-09-11 16:12:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:51,060 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:51,062 INFO L225 Difference]: With dead ends: 187 [2020-09-11 16:12:51,062 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 16:12:51,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:12:51,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 16:12:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-09-11 16:12:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 16:12:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 16:12:51,066 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 16:12:51,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:51,066 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 16:12:51,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 16:12:51,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:51,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:51,067 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:51,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:51,268 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:51,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 72 times [2020-09-11 16:12:51,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:51,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121487022] [2020-09-11 16:12:51,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:51,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121487022] [2020-09-11 16:12:51,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146329259] [2020-09-11 16:12:51,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:51,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:12:51,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:51,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:51,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:51,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:51,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:51,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:51,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608933251] [2020-09-11 16:12:51,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:51,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:51,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:51,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:51,616 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 16:12:52,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:52,219 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-09-11 16:12:52,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:12:52,220 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:52,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:52,222 INFO L225 Difference]: With dead ends: 212 [2020-09-11 16:12:52,222 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 16:12:52,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:12:52,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 16:12:52,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-11 16:12:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 16:12:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 16:12:52,229 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 16:12:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:52,229 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 16:12:52,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 16:12:52,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:52,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:52,230 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:52,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-11 16:12:52,439 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:52,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 73 times [2020-09-11 16:12:52,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:52,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847488960] [2020-09-11 16:12:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:52,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847488960] [2020-09-11 16:12:52,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138512029] [2020-09-11 16:12:52,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:52,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:52,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:52,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:52,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:52,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:52,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147346524] [2020-09-11 16:12:52,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:52,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:52,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:52,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:52,756 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 16:12:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:53,229 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-11 16:12:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:53,230 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:53,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:53,232 INFO L225 Difference]: With dead ends: 202 [2020-09-11 16:12:53,232 INFO L226 Difference]: Without dead ends: 197 [2020-09-11 16:12:53,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:12:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-11 16:12:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-09-11 16:12:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 16:12:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-09-11 16:12:53,236 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-09-11 16:12:53,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:53,237 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-09-11 16:12:53,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:53,237 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-09-11 16:12:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:53,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:53,237 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:53,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:53,438 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:53,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 74 times [2020-09-11 16:12:53,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:53,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485498780] [2020-09-11 16:12:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:53,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485498780] [2020-09-11 16:12:53,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021167368] [2020-09-11 16:12:53,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:53,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:53,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:53,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:53,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:53,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:53,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:53,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404482706] [2020-09-11 16:12:53,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:53,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:53,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:53,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:53,816 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-09-11 16:12:54,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:54,208 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-09-11 16:12:54,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:54,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:54,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:54,211 INFO L225 Difference]: With dead ends: 198 [2020-09-11 16:12:54,211 INFO L226 Difference]: Without dead ends: 196 [2020-09-11 16:12:54,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:12:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-11 16:12:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-09-11 16:12:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 16:12:54,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-11 16:12:54,215 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-11 16:12:54,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:54,215 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-11 16:12:54,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-11 16:12:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:54,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:54,216 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:54,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-09-11 16:12:54,417 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:54,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:54,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 75 times [2020-09-11 16:12:54,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:54,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965595752] [2020-09-11 16:12:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:54,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965595752] [2020-09-11 16:12:54,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583753167] [2020-09-11 16:12:54,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:54,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:12:54,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:54,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:54,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:54,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:54,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:54,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506327406] [2020-09-11 16:12:54,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:54,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:54,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:54,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:54,774 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-11 16:12:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:55,317 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-09-11 16:12:55,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:12:55,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:55,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:55,320 INFO L225 Difference]: With dead ends: 209 [2020-09-11 16:12:55,320 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 16:12:55,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:12:55,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 16:12:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-11 16:12:55,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 16:12:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 16:12:55,325 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 16:12:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:55,325 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 16:12:55,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 16:12:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:55,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:55,326 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:55,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:55,532 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:55,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:55,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 76 times [2020-09-11 16:12:55,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:55,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309629538] [2020-09-11 16:12:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:55,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309629538] [2020-09-11 16:12:55,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215737373] [2020-09-11 16:12:55,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:55,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:55,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:55,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:55,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:55,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:55,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:55,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:55,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496034220] [2020-09-11 16:12:55,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:55,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:55,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:55,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:55,897 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 16:12:56,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:56,612 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-09-11 16:12:56,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:12:56,613 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:56,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:56,614 INFO L225 Difference]: With dead ends: 217 [2020-09-11 16:12:56,615 INFO L226 Difference]: Without dead ends: 212 [2020-09-11 16:12:56,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:12:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-11 16:12:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-09-11 16:12:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-11 16:12:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-11 16:12:56,619 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-09-11 16:12:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:56,619 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-11 16:12:56,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-11 16:12:56,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:56,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:56,620 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:56,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-11 16:12:56,822 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:56,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:56,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 77 times [2020-09-11 16:12:56,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:56,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352394488] [2020-09-11 16:12:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:56,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352394488] [2020-09-11 16:12:56,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536166647] [2020-09-11 16:12:56,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:56,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:56,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:56,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:59,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:59,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:59,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:59,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489849400] [2020-09-11 16:12:59,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:59,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:59,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:59,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=144, Unknown=1, NotChecked=0, Total=210 [2020-09-11 16:12:59,233 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-09-11 16:13:03,644 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-11 16:13:07,901 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-11 16:13:08,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:08,507 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-09-11 16:13:08,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:13:08,508 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:08,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:08,509 INFO L225 Difference]: With dead ends: 236 [2020-09-11 16:13:08,509 INFO L226 Difference]: Without dead ends: 228 [2020-09-11 16:13:08,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=307, Invalid=684, Unknown=1, NotChecked=0, Total=992 [2020-09-11 16:13:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-11 16:13:08,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-09-11 16:13:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 16:13:08,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-09-11 16:13:08,512 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-09-11 16:13:08,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:08,513 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-09-11 16:13:08,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:08,513 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-09-11 16:13:08,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:08,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:08,514 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:08,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-11 16:13:08,714 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:08,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 78 times [2020-09-11 16:13:08,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:08,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851280043] [2020-09-11 16:13:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:08,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851280043] [2020-09-11 16:13:08,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069833594] [2020-09-11 16:13:08,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:08,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:13:08,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:08,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:08,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:09,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:13:09,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:13:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:09,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:09,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:09,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59889896] [2020-09-11 16:13:09,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:09,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:09,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:09,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:09,102 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-09-11 16:13:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:09,851 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-09-11 16:13:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:13:09,852 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:09,853 INFO L225 Difference]: With dead ends: 219 [2020-09-11 16:13:09,854 INFO L226 Difference]: Without dead ends: 214 [2020-09-11 16:13:09,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=593, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:13:09,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-11 16:13:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-09-11 16:13:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 16:13:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-09-11 16:13:09,858 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-09-11 16:13:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:09,858 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-09-11 16:13:09,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-09-11 16:13:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:09,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:09,859 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:10,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-11 16:13:10,060 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:10,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:10,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 79 times [2020-09-11 16:13:10,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:10,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365482848] [2020-09-11 16:13:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:10,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365482848] [2020-09-11 16:13:10,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893632983] [2020-09-11 16:13:10,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:10,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:10,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:10,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:10,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:10,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055132898] [2020-09-11 16:13:10,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:10,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:10,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:10,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:10,428 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-09-11 16:13:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:10,804 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-09-11 16:13:10,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:13:10,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:10,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:10,806 INFO L225 Difference]: With dead ends: 197 [2020-09-11 16:13:10,806 INFO L226 Difference]: Without dead ends: 195 [2020-09-11 16:13:10,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:13:10,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-11 16:13:10,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-09-11 16:13:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 16:13:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-09-11 16:13:10,812 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-09-11 16:13:10,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:10,812 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-09-11 16:13:10,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-09-11 16:13:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:10,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:10,813 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:11,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:11,016 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:11,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:11,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 80 times [2020-09-11 16:13:11,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:11,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649142047] [2020-09-11 16:13:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:11,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649142047] [2020-09-11 16:13:11,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582812122] [2020-09-11 16:13:11,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:11,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:13:11,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:11,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:11,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:11,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:11,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:11,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849343952] [2020-09-11 16:13:11,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:11,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:11,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:11,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:11,342 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-09-11 16:13:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:11,721 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-09-11 16:13:11,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:13:11,722 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:11,723 INFO L225 Difference]: With dead ends: 202 [2020-09-11 16:13:11,723 INFO L226 Difference]: Without dead ends: 200 [2020-09-11 16:13:11,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:13:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-11 16:13:11,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-09-11 16:13:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 16:13:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-09-11 16:13:11,728 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-09-11 16:13:11,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:11,728 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-09-11 16:13:11,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:11,728 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-09-11 16:13:11,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:11,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:11,729 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:11,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-11 16:13:11,934 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:11,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 81 times [2020-09-11 16:13:11,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:11,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302616633] [2020-09-11 16:13:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:12,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302616633] [2020-09-11 16:13:12,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332649012] [2020-09-11 16:13:12,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:12,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:13:12,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:12,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:12,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:12,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:12,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:12,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59802222] [2020-09-11 16:13:12,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:12,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:12,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:12,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:12,285 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-09-11 16:13:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:12,682 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-09-11 16:13:12,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:13:12,683 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:12,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:12,684 INFO L225 Difference]: With dead ends: 197 [2020-09-11 16:13:12,684 INFO L226 Difference]: Without dead ends: 195 [2020-09-11 16:13:12,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:13:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-11 16:13:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-09-11 16:13:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:13:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-09-11 16:13:12,687 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-09-11 16:13:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:12,687 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-09-11 16:13:12,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-09-11 16:13:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:12,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:12,688 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:12,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:12,889 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 82 times [2020-09-11 16:13:12,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:12,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990023417] [2020-09-11 16:13:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:12,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990023417] [2020-09-11 16:13:12,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37614153] [2020-09-11 16:13:12,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:13,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:13:13,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:13,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:13,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:13,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:13,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:13,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239562987] [2020-09-11 16:13:13,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:13,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:13,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:13,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:13,269 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-09-11 16:13:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:14,003 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-09-11 16:13:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:13:14,004 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:14,006 INFO L225 Difference]: With dead ends: 214 [2020-09-11 16:13:14,006 INFO L226 Difference]: Without dead ends: 212 [2020-09-11 16:13:14,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:13:14,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-11 16:13:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-09-11 16:13:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 16:13:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-09-11 16:13:14,013 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-09-11 16:13:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:14,013 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-09-11 16:13:14,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-09-11 16:13:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:14,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:14,015 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:14,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-11 16:13:14,230 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:14,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:14,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 83 times [2020-09-11 16:13:14,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:14,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108981491] [2020-09-11 16:13:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:14,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108981491] [2020-09-11 16:13:14,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402472163] [2020-09-11 16:13:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:14,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:13:14,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:14,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:14,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:14,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:14,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:14,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991670722] [2020-09-11 16:13:14,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:14,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:14,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:14,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:14,606 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-09-11 16:13:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:15,146 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-09-11 16:13:15,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:13:15,147 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:15,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:15,148 INFO L225 Difference]: With dead ends: 217 [2020-09-11 16:13:15,148 INFO L226 Difference]: Without dead ends: 215 [2020-09-11 16:13:15,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:13:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-11 16:13:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-09-11 16:13:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 16:13:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-11 16:13:15,153 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-11 16:13:15,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:15,153 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-11 16:13:15,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-11 16:13:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:15,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:15,154 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:15,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:15,365 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:15,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:15,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 84 times [2020-09-11 16:13:15,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:15,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064059133] [2020-09-11 16:13:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:15,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064059133] [2020-09-11 16:13:15,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230349123] [2020-09-11 16:13:15,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:15,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:13:15,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:15,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:15,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:15,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:15,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396539465] [2020-09-11 16:13:15,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:15,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:15,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:15,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:15,698 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-11 16:13:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:16,268 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-09-11 16:13:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:13:16,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:16,270 INFO L225 Difference]: With dead ends: 211 [2020-09-11 16:13:16,270 INFO L226 Difference]: Without dead ends: 209 [2020-09-11 16:13:16,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=559, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:13:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-11 16:13:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-09-11 16:13:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 16:13:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 16:13:16,274 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 16:13:16,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:16,274 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 16:13:16,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 16:13:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:16,275 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:16,275 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:16,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:16,476 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:16,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 85 times [2020-09-11 16:13:16,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:16,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119686384] [2020-09-11 16:13:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:16,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119686384] [2020-09-11 16:13:16,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444349121] [2020-09-11 16:13:16,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:16,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:16,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:16,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:13:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:16,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:16,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:16,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883931566] [2020-09-11 16:13:16,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:16,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:16,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:16,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:16,787 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 16:13:17,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:17,429 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-09-11 16:13:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:13:17,430 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:17,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:17,431 INFO L225 Difference]: With dead ends: 211 [2020-09-11 16:13:17,431 INFO L226 Difference]: Without dead ends: 206 [2020-09-11 16:13:17,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:13:17,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-11 16:13:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-09-11 16:13:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 16:13:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 16:13:17,435 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 16:13:17,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:17,435 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 16:13:17,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:17,435 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 16:13:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:17,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:17,436 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:17,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-09-11 16:13:17,637 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 86 times [2020-09-11 16:13:17,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:17,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030953627] [2020-09-11 16:13:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:17,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030953627] [2020-09-11 16:13:17,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712209484] [2020-09-11 16:13:17,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:17,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:13:17,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:17,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:17,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:17,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:13:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:17,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:17,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:17,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886046461] [2020-09-11 16:13:17,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:17,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:17,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:17,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:17,980 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 16:13:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:18,790 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-09-11 16:13:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:13:18,791 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:18,792 INFO L225 Difference]: With dead ends: 227 [2020-09-11 16:13:18,792 INFO L226 Difference]: Without dead ends: 222 [2020-09-11 16:13:18,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:13:18,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-11 16:13:18,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-09-11 16:13:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 16:13:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-11 16:13:18,796 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-11 16:13:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:18,796 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-11 16:13:18,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-11 16:13:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:18,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:18,797 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:18,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-11 16:13:18,998 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:18,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:18,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 87 times [2020-09-11 16:13:18,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:18,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90441918] [2020-09-11 16:13:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:19,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90441918] [2020-09-11 16:13:19,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543502712] [2020-09-11 16:13:19,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:19,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:13:19,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:19,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:19,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:19,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:19,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:19,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703486993] [2020-09-11 16:13:19,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:19,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:19,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:19,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:19,326 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-11 16:13:19,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:19,978 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-09-11 16:13:19,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:13:19,979 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:19,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:19,980 INFO L225 Difference]: With dead ends: 221 [2020-09-11 16:13:19,980 INFO L226 Difference]: Without dead ends: 219 [2020-09-11 16:13:19,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:13:19,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-11 16:13:19,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-09-11 16:13:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 16:13:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 16:13:19,984 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 16:13:19,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:19,984 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 16:13:19,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:19,984 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 16:13:19,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:19,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:19,984 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:20,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:20,185 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:20,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:20,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 88 times [2020-09-11 16:13:20,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:20,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715243113] [2020-09-11 16:13:20,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:20,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715243113] [2020-09-11 16:13:20,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540635140] [2020-09-11 16:13:20,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:20,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:13:20,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:20,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:20,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:20,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:13:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:20,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:20,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:20,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604776774] [2020-09-11 16:13:20,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:20,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:20,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:20,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:20,488 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 16:13:21,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:21,309 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-09-11 16:13:21,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:13:21,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:21,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:21,311 INFO L225 Difference]: With dead ends: 240 [2020-09-11 16:13:21,311 INFO L226 Difference]: Without dead ends: 232 [2020-09-11 16:13:21,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:13:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-11 16:13:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-09-11 16:13:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-11 16:13:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-09-11 16:13:21,315 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-09-11 16:13:21,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:21,316 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-09-11 16:13:21,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-09-11 16:13:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:21,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:21,317 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:21,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-11 16:13:21,527 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:21,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 89 times [2020-09-11 16:13:21,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:21,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032078240] [2020-09-11 16:13:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:21,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032078240] [2020-09-11 16:13:21,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211073526] [2020-09-11 16:13:21,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:21,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:13:21,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:21,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:21,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:21,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:13:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:21,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:21,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:21,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531417289] [2020-09-11 16:13:21,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:21,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:21,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:21,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:21,857 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-09-11 16:13:22,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:22,708 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-09-11 16:13:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:13:22,709 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:22,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:22,710 INFO L225 Difference]: With dead ends: 238 [2020-09-11 16:13:22,710 INFO L226 Difference]: Without dead ends: 230 [2020-09-11 16:13:22,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=357, Invalid=833, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:13:22,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-11 16:13:22,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-09-11 16:13:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:13:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-11 16:13:22,716 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-11 16:13:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:22,716 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-11 16:13:22,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-11 16:13:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:22,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:22,717 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:22,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-11 16:13:22,929 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:22,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:22,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 90 times [2020-09-11 16:13:22,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:22,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060707488] [2020-09-11 16:13:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:23,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060707488] [2020-09-11 16:13:23,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851715351] [2020-09-11 16:13:23,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:23,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:13:23,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:23,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:23,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:23,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:23,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:23,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915643704] [2020-09-11 16:13:23,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:23,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:23,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:23,284 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-11 16:13:23,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:23,672 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-09-11 16:13:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:13:23,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:23,674 INFO L225 Difference]: With dead ends: 195 [2020-09-11 16:13:23,674 INFO L226 Difference]: Without dead ends: 193 [2020-09-11 16:13:23,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:13:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-11 16:13:23,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-09-11 16:13:23,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:13:23,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-11 16:13:23,678 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-11 16:13:23,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:23,678 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-11 16:13:23,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:23,679 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-11 16:13:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:23,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:23,679 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:23,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-11 16:13:23,880 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:23,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 91 times [2020-09-11 16:13:23,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:23,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917407890] [2020-09-11 16:13:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:23,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917407890] [2020-09-11 16:13:23,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982592506] [2020-09-11 16:13:23,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:24,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:24,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:24,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:24,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:24,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101131971] [2020-09-11 16:13:24,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:24,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:24,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:24,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:24,233 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-11 16:13:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:24,927 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-09-11 16:13:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:13:24,928 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:24,929 INFO L225 Difference]: With dead ends: 206 [2020-09-11 16:13:24,930 INFO L226 Difference]: Without dead ends: 204 [2020-09-11 16:13:24,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=569, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:13:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-11 16:13:24,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-09-11 16:13:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 16:13:24,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-09-11 16:13:24,934 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-09-11 16:13:24,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:24,934 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-09-11 16:13:24,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:24,935 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-09-11 16:13:24,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:24,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:24,935 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:25,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:25,139 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:25,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 92 times [2020-09-11 16:13:25,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:25,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964603858] [2020-09-11 16:13:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:25,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964603858] [2020-09-11 16:13:25,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234047269] [2020-09-11 16:13:25,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:25,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:13:25,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:25,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:25,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:25,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:13:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:26,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:26,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-11 16:13:26,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214512046] [2020-09-11 16:13:26,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:13:26,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:26,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:13:26,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=174, Unknown=1, NotChecked=0, Total=240 [2020-09-11 16:13:26,840 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-09-11 16:13:29,025 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 25 [2020-09-11 16:13:51,923 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-09-11 16:14:11,868 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-09-11 16:14:30,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:30,251 INFO L93 Difference]: Finished difference Result 242 states and 573 transitions. [2020-09-11 16:14:30,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:14:30,285 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-09-11 16:14:30,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:30,285 INFO L225 Difference]: With dead ends: 242 [2020-09-11 16:14:30,285 INFO L226 Difference]: Without dead ends: 237 [2020-09-11 16:14:30,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=402, Invalid=995, Unknown=9, NotChecked=0, Total=1406 [2020-09-11 16:14:30,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-11 16:14:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 139. [2020-09-11 16:14:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 16:14:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-09-11 16:14:30,288 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-09-11 16:14:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:30,288 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-09-11 16:14:30,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:14:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-09-11 16:14:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:30,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:30,288 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:30,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-11 16:14:30,489 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:30,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 93 times [2020-09-11 16:14:30,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:30,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724181433] [2020-09-11 16:14:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:30,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724181433] [2020-09-11 16:14:30,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176254873] [2020-09-11 16:14:30,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:30,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:14:30,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:30,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:30,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:30,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:30,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:30,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263837822] [2020-09-11 16:14:30,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:30,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:30,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:30,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:30,819 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-09-11 16:14:31,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:31,231 INFO L93 Difference]: Finished difference Result 192 states and 445 transitions. [2020-09-11 16:14:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:14:31,232 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:31,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:31,233 INFO L225 Difference]: With dead ends: 192 [2020-09-11 16:14:31,233 INFO L226 Difference]: Without dead ends: 190 [2020-09-11 16:14:31,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:14:31,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-11 16:14:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 141. [2020-09-11 16:14:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 16:14:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-09-11 16:14:31,236 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-09-11 16:14:31,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:31,236 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-09-11 16:14:31,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:31,236 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-09-11 16:14:31,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:31,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:31,236 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:31,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-11 16:14:31,437 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:31,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:31,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 94 times [2020-09-11 16:14:31,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:31,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008968028] [2020-09-11 16:14:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:31,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008968028] [2020-09-11 16:14:31,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528756860] [2020-09-11 16:14:31,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:31,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:14:31,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:31,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:31,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:31,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:31,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:31,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387666784] [2020-09-11 16:14:31,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:31,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:31,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:31,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:31,790 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-09-11 16:14:32,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:32,218 INFO L93 Difference]: Finished difference Result 203 states and 467 transitions. [2020-09-11 16:14:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:14:32,219 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:32,220 INFO L225 Difference]: With dead ends: 203 [2020-09-11 16:14:32,220 INFO L226 Difference]: Without dead ends: 201 [2020-09-11 16:14:32,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:14:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-11 16:14:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 142. [2020-09-11 16:14:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:14:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-09-11 16:14:32,224 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-09-11 16:14:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:32,224 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-09-11 16:14:32,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:32,224 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-09-11 16:14:32,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:32,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:32,224 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:32,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:32,425 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:32,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:32,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 95 times [2020-09-11 16:14:32,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:32,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796990508] [2020-09-11 16:14:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:32,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796990508] [2020-09-11 16:14:32,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089323676] [2020-09-11 16:14:32,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:32,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:14:32,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:32,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:32,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:32,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:32,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:32,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270601477] [2020-09-11 16:14:32,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:32,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:32,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:32,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:32,765 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-09-11 16:14:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:33,154 INFO L93 Difference]: Finished difference Result 194 states and 452 transitions. [2020-09-11 16:14:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:14:33,155 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:33,156 INFO L225 Difference]: With dead ends: 194 [2020-09-11 16:14:33,156 INFO L226 Difference]: Without dead ends: 192 [2020-09-11 16:14:33,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:14:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-11 16:14:33,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 137. [2020-09-11 16:14:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 16:14:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-09-11 16:14:33,160 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-09-11 16:14:33,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:33,160 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-09-11 16:14:33,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-09-11 16:14:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:33,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:33,161 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:33,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:33,370 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:33,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:33,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 96 times [2020-09-11 16:14:33,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:33,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197431264] [2020-09-11 16:14:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:33,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197431264] [2020-09-11 16:14:33,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795062897] [2020-09-11 16:14:33,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:33,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:14:33,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:33,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:33,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:33,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:33,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:33,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768382511] [2020-09-11 16:14:33,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:33,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:33,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:33,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:33,677 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-09-11 16:14:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:34,327 INFO L93 Difference]: Finished difference Result 210 states and 483 transitions. [2020-09-11 16:14:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:14:34,328 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:34,329 INFO L225 Difference]: With dead ends: 210 [2020-09-11 16:14:34,329 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 16:14:34,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:14:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 16:14:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 140. [2020-09-11 16:14:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 16:14:34,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-09-11 16:14:34,333 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-09-11 16:14:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:34,333 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-09-11 16:14:34,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-09-11 16:14:34,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:34,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:34,333 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:34,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:34,534 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:34,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:34,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 97 times [2020-09-11 16:14:34,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:34,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256009794] [2020-09-11 16:14:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:34,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256009794] [2020-09-11 16:14:34,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38769137] [2020-09-11 16:14:34,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:34,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:34,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:34,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:34,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:34,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486783459] [2020-09-11 16:14:34,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:34,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:34,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:34,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:34,872 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-09-11 16:14:35,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:35,506 INFO L93 Difference]: Finished difference Result 219 states and 501 transitions. [2020-09-11 16:14:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:14:35,507 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:35,508 INFO L225 Difference]: With dead ends: 219 [2020-09-11 16:14:35,508 INFO L226 Difference]: Without dead ends: 217 [2020-09-11 16:14:35,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=624, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:14:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-11 16:14:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 140. [2020-09-11 16:14:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 16:14:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-09-11 16:14:35,511 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-09-11 16:14:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:35,511 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-09-11 16:14:35,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-09-11 16:14:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:35,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:35,512 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:35,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:35,713 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:35,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 98 times [2020-09-11 16:14:35,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:35,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16895978] [2020-09-11 16:14:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:35,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16895978] [2020-09-11 16:14:35,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977356162] [2020-09-11 16:14:35,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:35,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:14:35,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:35,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:35,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:36,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:36,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:36,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103439390] [2020-09-11 16:14:36,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:36,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:36,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:36,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:36,038 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-09-11 16:14:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:36,600 INFO L93 Difference]: Finished difference Result 196 states and 455 transitions. [2020-09-11 16:14:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:14:36,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:36,602 INFO L225 Difference]: With dead ends: 196 [2020-09-11 16:14:36,602 INFO L226 Difference]: Without dead ends: 194 [2020-09-11 16:14:36,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:14:36,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-11 16:14:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 139. [2020-09-11 16:14:36,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 16:14:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-11 16:14:36,605 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-11 16:14:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:36,605 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-11 16:14:36,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:36,606 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-11 16:14:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:36,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:36,606 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:36,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-11 16:14:36,807 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:36,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 99 times [2020-09-11 16:14:36,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:36,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908510326] [2020-09-11 16:14:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:36,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908510326] [2020-09-11 16:14:36,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853083583] [2020-09-11 16:14:36,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:36,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:14:36,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:36,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:36,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:37,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:37,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:37,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627870281] [2020-09-11 16:14:37,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:37,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:37,148 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-09-11 16:14:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:37,914 INFO L93 Difference]: Finished difference Result 211 states and 490 transitions. [2020-09-11 16:14:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:14:37,915 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:37,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:37,916 INFO L225 Difference]: With dead ends: 211 [2020-09-11 16:14:37,916 INFO L226 Difference]: Without dead ends: 209 [2020-09-11 16:14:37,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=337, Invalid=785, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:14:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-11 16:14:37,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 141. [2020-09-11 16:14:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 16:14:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-09-11 16:14:37,921 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-09-11 16:14:37,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:37,921 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-09-11 16:14:37,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:37,922 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-09-11 16:14:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:37,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:37,922 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:38,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-11 16:14:38,133 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:38,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:38,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 100 times [2020-09-11 16:14:38,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:38,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426114529] [2020-09-11 16:14:38,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:38,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426114529] [2020-09-11 16:14:38,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584040866] [2020-09-11 16:14:38,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:38,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:14:38,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:38,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:38,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:38,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:38,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:38,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585067776] [2020-09-11 16:14:38,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:38,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:38,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:38,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:38,469 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-09-11 16:14:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:39,221 INFO L93 Difference]: Finished difference Result 215 states and 498 transitions. [2020-09-11 16:14:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:14:39,222 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:39,223 INFO L225 Difference]: With dead ends: 215 [2020-09-11 16:14:39,223 INFO L226 Difference]: Without dead ends: 213 [2020-09-11 16:14:39,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:14:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-11 16:14:39,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-09-11 16:14:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:14:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-11 16:14:39,226 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-11 16:14:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:39,226 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-11 16:14:39,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-11 16:14:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:39,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:39,227 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:39,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-11 16:14:39,428 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:39,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 101 times [2020-09-11 16:14:39,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:39,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548501914] [2020-09-11 16:14:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:39,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548501914] [2020-09-11 16:14:39,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812394025] [2020-09-11 16:14:39,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:39,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:14:39,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:39,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:39,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:39,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:39,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233453616] [2020-09-11 16:14:39,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:39,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:39,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:39,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:39,749 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-11 16:14:40,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:40,538 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-11 16:14:40,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:14:40,539 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:40,540 INFO L225 Difference]: With dead ends: 202 [2020-09-11 16:14:40,540 INFO L226 Difference]: Without dead ends: 200 [2020-09-11 16:14:40,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:14:40,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-11 16:14:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2020-09-11 16:14:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 16:14:40,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 16:14:40,544 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 16:14:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:40,544 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 16:14:40,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:40,544 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 16:14:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:40,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:40,545 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:40,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:40,748 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 102 times [2020-09-11 16:14:40,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:40,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018342478] [2020-09-11 16:14:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:40,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018342478] [2020-09-11 16:14:40,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087758136] [2020-09-11 16:14:40,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:40,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:14:40,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:40,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:40,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:41,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:14:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:41,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:41,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:41,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432232995] [2020-09-11 16:14:41,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:41,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:41,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:41,067 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 16:14:41,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:41,793 INFO L93 Difference]: Finished difference Result 196 states and 472 transitions. [2020-09-11 16:14:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:14:41,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:41,795 INFO L225 Difference]: With dead ends: 196 [2020-09-11 16:14:41,796 INFO L226 Difference]: Without dead ends: 191 [2020-09-11 16:14:41,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=382, Invalid=808, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:14:41,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-11 16:14:41,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 144. [2020-09-11 16:14:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 16:14:41,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 16:14:41,800 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 16:14:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:41,801 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 16:14:41,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:41,801 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 16:14:41,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:41,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:41,801 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:42,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-11 16:14:42,004 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:42,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:42,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 103 times [2020-09-11 16:14:42,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:42,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942071746] [2020-09-11 16:14:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:42,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942071746] [2020-09-11 16:14:42,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358383047] [2020-09-11 16:14:42,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:42,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:42,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:42,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:14:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:42,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:42,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:42,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221636304] [2020-09-11 16:14:42,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:42,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:42,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:42,402 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 16:14:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:43,500 INFO L93 Difference]: Finished difference Result 227 states and 547 transitions. [2020-09-11 16:14:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:14:43,501 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:43,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:43,502 INFO L225 Difference]: With dead ends: 227 [2020-09-11 16:14:43,502 INFO L226 Difference]: Without dead ends: 222 [2020-09-11 16:14:43,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=993, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:14:43,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-11 16:14:43,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 142. [2020-09-11 16:14:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:14:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-11 16:14:43,510 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-11 16:14:43,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:43,510 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-11 16:14:43,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:43,511 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-11 16:14:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:43,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:43,512 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:43,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:43,724 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:43,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 104 times [2020-09-11 16:14:43,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:43,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440437559] [2020-09-11 16:14:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:43,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440437559] [2020-09-11 16:14:43,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992934797] [2020-09-11 16:14:43,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:43,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:14:43,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:43,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:43,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:44,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:44,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:44,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576669375] [2020-09-11 16:14:44,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:44,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:44,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:44,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:44,083 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-11 16:14:44,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:44,945 INFO L93 Difference]: Finished difference Result 226 states and 535 transitions. [2020-09-11 16:14:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:14:44,946 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:44,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:44,947 INFO L225 Difference]: With dead ends: 226 [2020-09-11 16:14:44,947 INFO L226 Difference]: Without dead ends: 224 [2020-09-11 16:14:44,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:14:44,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-11 16:14:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 144. [2020-09-11 16:14:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 16:14:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 16:14:44,951 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 16:14:44,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:44,951 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 16:14:44,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:44,952 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 16:14:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:44,952 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:44,952 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:45,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-11 16:14:45,153 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:45,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 105 times [2020-09-11 16:14:45,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:45,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016054866] [2020-09-11 16:14:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:45,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016054866] [2020-09-11 16:14:45,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152646428] [2020-09-11 16:14:45,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:45,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:14:45,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:45,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:45,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:14:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:45,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:45,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:45,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257776228] [2020-09-11 16:14:45,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:45,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:45,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:45,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:45,527 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 16:14:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:46,714 INFO L93 Difference]: Finished difference Result 247 states and 597 transitions. [2020-09-11 16:14:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:14:46,715 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:46,716 INFO L225 Difference]: With dead ends: 247 [2020-09-11 16:14:46,716 INFO L226 Difference]: Without dead ends: 239 [2020-09-11 16:14:46,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=448, Invalid=1034, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:14:46,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-11 16:14:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 146. [2020-09-11 16:14:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-11 16:14:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-09-11 16:14:46,719 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-09-11 16:14:46,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:46,720 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-09-11 16:14:46,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-09-11 16:14:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:46,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:46,721 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:46,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:46,922 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:46,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:46,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 106 times [2020-09-11 16:14:46,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:46,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713469280] [2020-09-11 16:14:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:47,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713469280] [2020-09-11 16:14:47,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172218173] [2020-09-11 16:14:47,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:47,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:14:47,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:47,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:47,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:47,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:14:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:47,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:47,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:47,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128609929] [2020-09-11 16:14:47,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:47,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:47,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:47,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:47,264 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-09-11 16:14:48,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:48,423 INFO L93 Difference]: Finished difference Result 246 states and 590 transitions. [2020-09-11 16:14:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:14:48,425 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:48,426 INFO L225 Difference]: With dead ends: 246 [2020-09-11 16:14:48,426 INFO L226 Difference]: Without dead ends: 238 [2020-09-11 16:14:48,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:14:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-11 16:14:48,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-09-11 16:14:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 16:14:48,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-09-11 16:14:48,430 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-09-11 16:14:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:48,431 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-09-11 16:14:48,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-09-11 16:14:48,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:48,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:48,431 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:48,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-09-11 16:14:48,642 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:48,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:48,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 107 times [2020-09-11 16:14:48,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:48,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811386134] [2020-09-11 16:14:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:48,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811386134] [2020-09-11 16:14:48,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248177973] [2020-09-11 16:14:48,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:48,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:14:48,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:48,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:48,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:48,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:48,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:48,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675638131] [2020-09-11 16:14:48,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:48,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:48,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:48,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:48,963 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-09-11 16:14:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:49,646 INFO L93 Difference]: Finished difference Result 209 states and 489 transitions. [2020-09-11 16:14:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:14:49,647 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:49,648 INFO L225 Difference]: With dead ends: 209 [2020-09-11 16:14:49,648 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 16:14:49,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:14:49,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 16:14:49,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 136. [2020-09-11 16:14:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 16:14:49,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-09-11 16:14:49,652 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-09-11 16:14:49,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:49,652 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-09-11 16:14:49,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:49,652 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-09-11 16:14:49,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:49,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:49,653 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:49,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:49,854 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:49,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:49,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 108 times [2020-09-11 16:14:49,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:49,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507414756] [2020-09-11 16:14:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:49,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507414756] [2020-09-11 16:14:49,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047412707] [2020-09-11 16:14:49,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:50,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:14:50,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:50,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:50,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:50,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:50,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:50,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520645109] [2020-09-11 16:14:50,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:50,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:50,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:50,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:50,185 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-09-11 16:14:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:51,038 INFO L93 Difference]: Finished difference Result 205 states and 487 transitions. [2020-09-11 16:14:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:14:51,040 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:51,041 INFO L225 Difference]: With dead ends: 205 [2020-09-11 16:14:51,041 INFO L226 Difference]: Without dead ends: 203 [2020-09-11 16:14:51,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:14:51,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-11 16:14:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 137. [2020-09-11 16:14:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 16:14:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-11 16:14:51,044 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-11 16:14:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:51,044 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-11 16:14:51,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-11 16:14:51,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:51,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:51,045 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:51,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-11 16:14:51,246 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:51,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:51,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 109 times [2020-09-11 16:14:51,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:51,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770192208] [2020-09-11 16:14:51,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:51,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770192208] [2020-09-11 16:14:51,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254898167] [2020-09-11 16:14:51,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:51,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:51,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:51,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:14:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:51,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:51,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:51,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781939976] [2020-09-11 16:14:51,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:51,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:51,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:51,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:51,559 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-11 16:14:52,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:52,644 INFO L93 Difference]: Finished difference Result 228 states and 547 transitions. [2020-09-11 16:14:52,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:14:52,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:52,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:52,646 INFO L225 Difference]: With dead ends: 228 [2020-09-11 16:14:52,647 INFO L226 Difference]: Without dead ends: 220 [2020-09-11 16:14:52,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:14:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-11 16:14:52,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 137. [2020-09-11 16:14:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 16:14:52,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-11 16:14:52,650 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-11 16:14:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:52,650 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-11 16:14:52,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-11 16:14:52,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:52,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:52,651 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:52,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-11 16:14:52,852 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:52,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:52,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 110 times [2020-09-11 16:14:52,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:52,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559930397] [2020-09-11 16:14:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:52,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559930397] [2020-09-11 16:14:52,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861876020] [2020-09-11 16:14:52,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:53,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:14:53,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:53,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:53,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:53,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:14:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:53,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:53,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:53,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313675829] [2020-09-11 16:14:53,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:53,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:53,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:53,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:53,176 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-11 16:14:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:54,141 INFO L93 Difference]: Finished difference Result 228 states and 550 transitions. [2020-09-11 16:14:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:14:54,142 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:54,143 INFO L225 Difference]: With dead ends: 228 [2020-09-11 16:14:54,143 INFO L226 Difference]: Without dead ends: 220 [2020-09-11 16:14:54,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:14:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-11 16:14:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 133. [2020-09-11 16:14:54,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-11 16:14:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-09-11 16:14:54,146 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-09-11 16:14:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:54,146 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-09-11 16:14:54,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:54,146 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-09-11 16:14:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:54,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:54,147 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:54,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-11 16:14:54,355 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:54,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:54,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 111 times [2020-09-11 16:14:54,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:54,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861524525] [2020-09-11 16:14:54,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:54,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861524525] [2020-09-11 16:14:54,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795232782] [2020-09-11 16:14:54,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:54,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:14:54,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:54,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:54,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:14:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:54,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:54,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:54,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819690288] [2020-09-11 16:14:54,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:54,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:54,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:54,684 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-09-11 16:14:55,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:55,762 INFO L93 Difference]: Finished difference Result 224 states and 533 transitions. [2020-09-11 16:14:55,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:14:55,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:55,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:55,764 INFO L225 Difference]: With dead ends: 224 [2020-09-11 16:14:55,764 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 16:14:55,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:14:55,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 16:14:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 130. [2020-09-11 16:14:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-11 16:14:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-09-11 16:14:55,768 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-09-11 16:14:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:55,768 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-09-11 16:14:55,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:55,768 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-09-11 16:14:55,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:55,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:55,769 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:55,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:55,970 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-09-11 16:14:55,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:55,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563481138] [2020-09-11 16:14:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:56,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563481138] [2020-09-11 16:14:56,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995479312] [2020-09-11 16:14:56,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:56,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:14:56,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:14:56,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:56,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:14:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:56,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:56,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-11 16:14:56,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125788289] [2020-09-11 16:14:56,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:14:56,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:56,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:14:56,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:14:56,404 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-09-11 16:14:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:56,700 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-09-11 16:14:56,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:14:56,701 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-09-11 16:14:56,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:56,702 INFO L225 Difference]: With dead ends: 185 [2020-09-11 16:14:56,702 INFO L226 Difference]: Without dead ends: 180 [2020-09-11 16:14:56,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:14:56,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-11 16:14:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-09-11 16:14:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 16:14:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-11 16:14:56,707 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-11 16:14:56,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:56,708 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-11 16:14:56,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:14:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-11 16:14:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:56,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:56,709 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:56,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:56,920 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:56,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:56,920 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-09-11 16:14:56,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:56,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969047999] [2020-09-11 16:14:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:57,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969047999] [2020-09-11 16:14:57,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229177734] [2020-09-11 16:14:57,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:57,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:14:57,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:57,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:14:57,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:57,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:57,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:14:57,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393798865] [2020-09-11 16:14:57,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:14:57,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:57,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:14:57,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:14:57,296 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-09-11 16:14:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:57,597 INFO L93 Difference]: Finished difference Result 186 states and 435 transitions. [2020-09-11 16:14:57,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:14:57,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:14:57,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:57,599 INFO L225 Difference]: With dead ends: 186 [2020-09-11 16:14:57,599 INFO L226 Difference]: Without dead ends: 183 [2020-09-11 16:14:57,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:14:57,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-11 16:14:57,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2020-09-11 16:14:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-11 16:14:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-11 16:14:57,603 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-11 16:14:57,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:57,604 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-11 16:14:57,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:14:57,604 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-11 16:14:57,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:57,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:57,604 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:57,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-11 16:14:57,805 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:57,805 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-09-11 16:14:57,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:57,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103451515] [2020-09-11 16:14:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:57,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103451515] [2020-09-11 16:14:57,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971898085] [2020-09-11 16:14:57,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:57,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:14:57,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:57,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:14:57,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:58,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:58,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:14:58,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548055560] [2020-09-11 16:14:58,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:14:58,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:58,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:14:58,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:14:58,233 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-11 16:14:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:58,649 INFO L93 Difference]: Finished difference Result 203 states and 468 transitions. [2020-09-11 16:14:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:14:58,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:14:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:58,651 INFO L225 Difference]: With dead ends: 203 [2020-09-11 16:14:58,651 INFO L226 Difference]: Without dead ends: 200 [2020-09-11 16:14:58,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:14:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-11 16:14:58,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 148. [2020-09-11 16:14:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-11 16:14:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-11 16:14:58,654 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-11 16:14:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:58,654 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-11 16:14:58,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:14:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-11 16:14:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:58,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:58,654 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:58,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-11 16:14:58,856 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:58,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:58,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-09-11 16:14:58,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:58,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640499554] [2020-09-11 16:14:58,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:58,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640499554] [2020-09-11 16:14:58,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970952165] [2020-09-11 16:14:58,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:59,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:14:59,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:59,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:14:59,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:14:59,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:59,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:14:59,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123444938] [2020-09-11 16:14:59,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:14:59,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:59,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:14:59,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:14:59,265 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-11 16:14:59,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:59,800 INFO L93 Difference]: Finished difference Result 211 states and 486 transitions. [2020-09-11 16:14:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:14:59,801 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:14:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:59,802 INFO L225 Difference]: With dead ends: 211 [2020-09-11 16:14:59,802 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 16:14:59,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:14:59,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 16:14:59,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 149. [2020-09-11 16:14:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-11 16:14:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-09-11 16:14:59,806 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-09-11 16:14:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:59,807 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-09-11 16:14:59,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:14:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-09-11 16:14:59,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:59,807 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:59,807 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:00,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:00,011 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:00,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-09-11 16:15:00,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:00,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066136136] [2020-09-11 16:15:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:00,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066136136] [2020-09-11 16:15:00,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827507698] [2020-09-11 16:15:00,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:00,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:15:00,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:00,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:00,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:00,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:00,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:00,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513578492] [2020-09-11 16:15:00,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:00,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:00,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:00,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:00,491 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-09-11 16:15:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:01,246 INFO L93 Difference]: Finished difference Result 213 states and 492 transitions. [2020-09-11 16:15:01,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:15:01,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:15:01,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:01,248 INFO L225 Difference]: With dead ends: 213 [2020-09-11 16:15:01,249 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 16:15:01,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:15:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 16:15:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 150. [2020-09-11 16:15:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-11 16:15:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-09-11 16:15:01,254 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-09-11 16:15:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:01,255 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-09-11 16:15:01,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-09-11 16:15:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:01,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:01,256 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:01,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:01,468 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:01,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-09-11 16:15:01,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:01,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402671779] [2020-09-11 16:15:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:01,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402671779] [2020-09-11 16:15:01,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431913847] [2020-09-11 16:15:01,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:01,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:01,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:01,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:01,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:01,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100578314] [2020-09-11 16:15:01,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:01,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:01,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:01,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:01,837 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-09-11 16:15:02,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:02,418 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2020-09-11 16:15:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:15:02,420 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:15:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:02,421 INFO L225 Difference]: With dead ends: 207 [2020-09-11 16:15:02,421 INFO L226 Difference]: Without dead ends: 204 [2020-09-11 16:15:02,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:15:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-11 16:15:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 152. [2020-09-11 16:15:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-11 16:15:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-09-11 16:15:02,424 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-09-11 16:15:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:02,424 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-09-11 16:15:02,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-09-11 16:15:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:02,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:02,425 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:02,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:02,626 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:02,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-09-11 16:15:02,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:02,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763789423] [2020-09-11 16:15:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:02,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763789423] [2020-09-11 16:15:02,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146000533] [2020-09-11 16:15:02,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:02,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:15:02,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:02,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:02,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:02,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:02,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:02,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815575538] [2020-09-11 16:15:02,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:02,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:02,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:02,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:02,993 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-09-11 16:15:03,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:03,476 INFO L93 Difference]: Finished difference Result 197 states and 464 transitions. [2020-09-11 16:15:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:15:03,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:15:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:03,482 INFO L225 Difference]: With dead ends: 197 [2020-09-11 16:15:03,483 INFO L226 Difference]: Without dead ends: 194 [2020-09-11 16:15:03,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:15:03,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-11 16:15:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 154. [2020-09-11 16:15:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-11 16:15:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-09-11 16:15:03,486 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-09-11 16:15:03,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:03,486 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-09-11 16:15:03,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:03,486 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-09-11 16:15:03,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:03,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:03,487 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:03,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-09-11 16:15:03,703 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:03,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:03,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-09-11 16:15:03,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:03,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621149514] [2020-09-11 16:15:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:03,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621149514] [2020-09-11 16:15:03,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635013272] [2020-09-11 16:15:03,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:03,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:15:03,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:03,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:03,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:04,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:15:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:04,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:04,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:04,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475828665] [2020-09-11 16:15:04,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:04,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:04,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:04,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:04,067 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-09-11 16:15:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:04,668 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-11 16:15:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:15:04,669 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:15:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:04,670 INFO L225 Difference]: With dead ends: 202 [2020-09-11 16:15:04,670 INFO L226 Difference]: Without dead ends: 196 [2020-09-11 16:15:04,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:15:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-11 16:15:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-09-11 16:15:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-11 16:15:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-09-11 16:15:04,673 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-09-11 16:15:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:04,673 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-09-11 16:15:04,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-09-11 16:15:04,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:04,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:04,674 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:04,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-11 16:15:04,875 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:04,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:04,875 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 112 times [2020-09-11 16:15:04,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:04,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454073958] [2020-09-11 16:15:04,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:05,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454073958] [2020-09-11 16:15:05,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927302500] [2020-09-11 16:15:05,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:05,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:15:05,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:05,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:05,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:05,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:05,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:05,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452460804] [2020-09-11 16:15:05,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:05,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:05,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:05,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:05,314 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-09-11 16:15:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:05,408 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-09-11 16:15:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:15:05,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:05,410 INFO L225 Difference]: With dead ends: 188 [2020-09-11 16:15:05,410 INFO L226 Difference]: Without dead ends: 186 [2020-09-11 16:15:05,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-11 16:15:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-09-11 16:15:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-11 16:15:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-09-11 16:15:05,415 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-09-11 16:15:05,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:05,415 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-09-11 16:15:05,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:05,415 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-09-11 16:15:05,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:05,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:05,416 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:05,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-11 16:15:05,624 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:05,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:05,625 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 113 times [2020-09-11 16:15:05,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:05,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735879210] [2020-09-11 16:15:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:05,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735879210] [2020-09-11 16:15:05,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132870170] [2020-09-11 16:15:05,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:05,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:15:05,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:05,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:05,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:06,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:06,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:06,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956094137] [2020-09-11 16:15:06,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:06,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:06,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:06,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:06,061 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-09-11 16:15:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:06,209 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-09-11 16:15:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:15:06,211 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:06,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:06,212 INFO L225 Difference]: With dead ends: 199 [2020-09-11 16:15:06,212 INFO L226 Difference]: Without dead ends: 197 [2020-09-11 16:15:06,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:15:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-11 16:15:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-09-11 16:15:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-11 16:15:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-11 16:15:06,216 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-11 16:15:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:06,216 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-11 16:15:06,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-11 16:15:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:06,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:06,217 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:06,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-11 16:15:06,418 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:06,418 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 114 times [2020-09-11 16:15:06,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:06,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486794012] [2020-09-11 16:15:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:06,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486794012] [2020-09-11 16:15:06,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834700537] [2020-09-11 16:15:06,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:06,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:15:06,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:06,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:06,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:06,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:06,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:06,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063502304] [2020-09-11 16:15:06,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:06,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:06,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:06,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:06,892 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-11 16:15:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:07,159 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-11 16:15:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:15:07,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:07,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:07,161 INFO L225 Difference]: With dead ends: 210 [2020-09-11 16:15:07,162 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 16:15:07,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:15:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 16:15:07,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-09-11 16:15:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-11 16:15:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-09-11 16:15:07,166 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-09-11 16:15:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:07,166 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-09-11 16:15:07,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-09-11 16:15:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:07,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:07,166 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:07,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-11 16:15:07,367 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:07,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:07,368 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 115 times [2020-09-11 16:15:07,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:07,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187212716] [2020-09-11 16:15:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:07,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187212716] [2020-09-11 16:15:07,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337792146] [2020-09-11 16:15:07,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:07,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:07,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:09,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:09,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:09,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764967349] [2020-09-11 16:15:09,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:09,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:09,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:09,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:09,198 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-09-11 16:15:09,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:09,537 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-11 16:15:09,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:15:09,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:09,539 INFO L225 Difference]: With dead ends: 210 [2020-09-11 16:15:09,539 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 16:15:09,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:15:09,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 16:15:09,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-09-11 16:15:09,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-11 16:15:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-11 16:15:09,543 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-11 16:15:09,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:09,543 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-11 16:15:09,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-11 16:15:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:09,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:09,544 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:09,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-11 16:15:09,744 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:09,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:09,745 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 116 times [2020-09-11 16:15:09,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:09,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707725352] [2020-09-11 16:15:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:09,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707725352] [2020-09-11 16:15:09,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791261944] [2020-09-11 16:15:09,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:09,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:15:09,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:09,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:14,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:14,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:14,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438504677] [2020-09-11 16:15:14,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:14,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:14,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:14,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-09-11 16:15:14,220 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-11 16:15:18,454 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-11 16:15:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:18,702 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-11 16:15:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:15:18,703 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:18,704 INFO L225 Difference]: With dead ends: 218 [2020-09-11 16:15:18,704 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 16:15:18,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=144, Invalid=317, Unknown=1, NotChecked=0, Total=462 [2020-09-11 16:15:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 16:15:18,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-11 16:15:18,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 16:15:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 16:15:18,711 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 16:15:18,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:18,711 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 16:15:18,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 16:15:18,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:18,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:18,712 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:18,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:18,913 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:18,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:18,914 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 117 times [2020-09-11 16:15:18,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:18,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740440618] [2020-09-11 16:15:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:19,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740440618] [2020-09-11 16:15:19,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682387482] [2020-09-11 16:15:19,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:19,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:15:19,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:19,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:19,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:19,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:19,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:19,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476446776] [2020-09-11 16:15:19,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:19,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:19,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:19,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:19,416 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 16:15:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:19,786 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-09-11 16:15:19,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:15:19,787 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:19,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:19,787 INFO L225 Difference]: With dead ends: 212 [2020-09-11 16:15:19,788 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 16:15:19,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:15:19,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 16:15:19,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-09-11 16:15:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-11 16:15:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-09-11 16:15:19,791 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-09-11 16:15:19,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:19,791 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-09-11 16:15:19,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-09-11 16:15:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:19,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:19,792 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:20,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-11 16:15:20,000 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:20,000 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 118 times [2020-09-11 16:15:20,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:20,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853275329] [2020-09-11 16:15:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:20,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853275329] [2020-09-11 16:15:20,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049061679] [2020-09-11 16:15:20,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:20,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:15:20,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:20,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:20,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:20,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:20,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:20,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376751464] [2020-09-11 16:15:20,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:20,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:20,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:20,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:20,412 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-09-11 16:15:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:20,780 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-11 16:15:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:15:20,782 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:20,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:20,783 INFO L225 Difference]: With dead ends: 212 [2020-09-11 16:15:20,783 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 16:15:20,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:15:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 16:15:20,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-09-11 16:15:20,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 16:15:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 16:15:20,787 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 16:15:20,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:20,787 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 16:15:20,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 16:15:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:20,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:20,788 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:20,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:20,991 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:20,992 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 119 times [2020-09-11 16:15:20,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:20,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600096102] [2020-09-11 16:15:20,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:21,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600096102] [2020-09-11 16:15:21,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616586608] [2020-09-11 16:15:21,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:21,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:15:21,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:21,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:21,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:21,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:21,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:21,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186703838] [2020-09-11 16:15:21,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:21,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:21,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:21,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:21,407 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 16:15:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:21,830 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-09-11 16:15:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:15:21,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:21,832 INFO L225 Difference]: With dead ends: 224 [2020-09-11 16:15:21,832 INFO L226 Difference]: Without dead ends: 222 [2020-09-11 16:15:21,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:15:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-11 16:15:21,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-09-11 16:15:21,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 16:15:21,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 16:15:21,836 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 16:15:21,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:21,836 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 16:15:21,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:21,837 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 16:15:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:21,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:21,837 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:22,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:22,038 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:22,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:22,039 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 120 times [2020-09-11 16:15:22,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:22,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760354773] [2020-09-11 16:15:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:22,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760354773] [2020-09-11 16:15:22,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295368304] [2020-09-11 16:15:22,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:22,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:15:22,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:22,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:22,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:22,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:22,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:22,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574720379] [2020-09-11 16:15:22,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:22,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:22,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:22,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:22,457 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 16:15:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:22,833 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-09-11 16:15:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:15:22,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:22,835 INFO L225 Difference]: With dead ends: 218 [2020-09-11 16:15:22,835 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 16:15:22,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:15:22,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 16:15:22,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-11 16:15:22,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 16:15:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 16:15:22,838 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 16:15:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:22,838 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 16:15:22,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 16:15:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:22,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:22,839 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:23,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:23,041 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:23,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:23,042 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 121 times [2020-09-11 16:15:23,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:23,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155564935] [2020-09-11 16:15:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:23,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155564935] [2020-09-11 16:15:23,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786493992] [2020-09-11 16:15:23,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:23,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:23,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:23,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:23,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:23,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66381228] [2020-09-11 16:15:23,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:23,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:23,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:23,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:23,420 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 16:15:23,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:23,720 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-09-11 16:15:23,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:15:23,724 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:23,724 INFO L225 Difference]: With dead ends: 206 [2020-09-11 16:15:23,724 INFO L226 Difference]: Without dead ends: 204 [2020-09-11 16:15:23,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:15:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-11 16:15:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-09-11 16:15:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-11 16:15:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-09-11 16:15:23,727 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-09-11 16:15:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:23,727 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-09-11 16:15:23,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-09-11 16:15:23,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:23,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:23,728 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:23,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:23,928 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 122 times [2020-09-11 16:15:23,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:23,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565958823] [2020-09-11 16:15:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:24,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565958823] [2020-09-11 16:15:24,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545944615] [2020-09-11 16:15:24,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:24,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:15:24,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:24,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:24,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:24,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:24,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:24,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867926901] [2020-09-11 16:15:24,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:24,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:24,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:24,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:24,342 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-09-11 16:15:24,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:24,856 INFO L93 Difference]: Finished difference Result 210 states and 502 transitions. [2020-09-11 16:15:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:15:24,857 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:24,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:24,858 INFO L225 Difference]: With dead ends: 210 [2020-09-11 16:15:24,858 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 16:15:24,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:15:24,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 16:15:24,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 159. [2020-09-11 16:15:24,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-11 16:15:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-09-11 16:15:24,861 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-09-11 16:15:24,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:24,862 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-09-11 16:15:24,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-09-11 16:15:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:24,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:24,862 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:25,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-11 16:15:25,063 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:25,064 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 123 times [2020-09-11 16:15:25,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:25,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844119452] [2020-09-11 16:15:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:25,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844119452] [2020-09-11 16:15:25,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747771458] [2020-09-11 16:15:25,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:25,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:15:25,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:25,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:25,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:25,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:25,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:25,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60584842] [2020-09-11 16:15:25,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:25,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:25,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:25,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:25,591 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-09-11 16:15:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:26,127 INFO L93 Difference]: Finished difference Result 216 states and 515 transitions. [2020-09-11 16:15:26,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:15:26,128 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:26,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:26,129 INFO L225 Difference]: With dead ends: 216 [2020-09-11 16:15:26,129 INFO L226 Difference]: Without dead ends: 214 [2020-09-11 16:15:26,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:15:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-11 16:15:26,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 158. [2020-09-11 16:15:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-11 16:15:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-09-11 16:15:26,133 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-09-11 16:15:26,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:26,134 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-09-11 16:15:26,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-09-11 16:15:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:26,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:26,135 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:26,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-11 16:15:26,344 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:26,345 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 124 times [2020-09-11 16:15:26,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:26,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813600790] [2020-09-11 16:15:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:26,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813600790] [2020-09-11 16:15:26,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383986167] [2020-09-11 16:15:26,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:26,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:15:26,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:26,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:26,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:26,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:26,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:26,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030609874] [2020-09-11 16:15:26,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:26,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:26,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:26,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:26,915 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-09-11 16:15:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:27,436 INFO L93 Difference]: Finished difference Result 227 states and 536 transitions. [2020-09-11 16:15:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:15:27,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:27,437 INFO L225 Difference]: With dead ends: 227 [2020-09-11 16:15:27,437 INFO L226 Difference]: Without dead ends: 225 [2020-09-11 16:15:27,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:15:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-11 16:15:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-11 16:15:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-11 16:15:27,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-09-11 16:15:27,440 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-09-11 16:15:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:27,440 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-09-11 16:15:27,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:27,441 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-09-11 16:15:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:27,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:27,441 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:27,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-11 16:15:27,642 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:27,642 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 125 times [2020-09-11 16:15:27,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:27,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134415888] [2020-09-11 16:15:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:27,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134415888] [2020-09-11 16:15:27,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222938826] [2020-09-11 16:15:27,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:27,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:15:27,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:27,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:27,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:28,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:28,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:28,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727568834] [2020-09-11 16:15:28,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:28,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:28,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:28,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:28,046 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-09-11 16:15:28,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:28,483 INFO L93 Difference]: Finished difference Result 219 states and 521 transitions. [2020-09-11 16:15:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:15:28,484 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:28,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:28,485 INFO L225 Difference]: With dead ends: 219 [2020-09-11 16:15:28,485 INFO L226 Difference]: Without dead ends: 217 [2020-09-11 16:15:28,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:15:28,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-11 16:15:28,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-09-11 16:15:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-11 16:15:28,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-09-11 16:15:28,489 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-09-11 16:15:28,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:28,489 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-09-11 16:15:28,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:28,489 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-09-11 16:15:28,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:28,489 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:28,490 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:28,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-11 16:15:28,690 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:28,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:28,691 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 126 times [2020-09-11 16:15:28,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:28,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56743315] [2020-09-11 16:15:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:28,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56743315] [2020-09-11 16:15:28,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705040487] [2020-09-11 16:15:28,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:28,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:15:28,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:28,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:28,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:29,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:29,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:29,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521592545] [2020-09-11 16:15:29,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:29,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:29,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:29,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:29,147 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-09-11 16:15:29,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:29,602 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-11 16:15:29,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:15:29,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:29,604 INFO L225 Difference]: With dead ends: 218 [2020-09-11 16:15:29,604 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 16:15:29,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:15:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 16:15:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 160. [2020-09-11 16:15:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-11 16:15:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-09-11 16:15:29,607 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-09-11 16:15:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:29,607 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-09-11 16:15:29,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-09-11 16:15:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:29,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:29,608 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:29,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:29,809 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 127 times [2020-09-11 16:15:29,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:29,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159760054] [2020-09-11 16:15:29,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:29,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159760054] [2020-09-11 16:15:29,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985002335] [2020-09-11 16:15:29,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:30,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:30,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:30,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:30,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:30,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152963483] [2020-09-11 16:15:30,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:30,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:30,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:30,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:30,225 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-09-11 16:15:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:30,588 INFO L93 Difference]: Finished difference Result 209 states and 498 transitions. [2020-09-11 16:15:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:15:30,590 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:30,590 INFO L225 Difference]: With dead ends: 209 [2020-09-11 16:15:30,591 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 16:15:30,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:15:30,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 16:15:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 158. [2020-09-11 16:15:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-11 16:15:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-09-11 16:15:30,594 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-09-11 16:15:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:30,594 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-09-11 16:15:30,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-09-11 16:15:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:30,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:30,595 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:30,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-09-11 16:15:30,795 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:30,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:30,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 128 times [2020-09-11 16:15:30,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:30,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341116231] [2020-09-11 16:15:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:31,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341116231] [2020-09-11 16:15:31,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373556175] [2020-09-11 16:15:31,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:31,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:15:31,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:31,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:31,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:31,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:31,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:31,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114455526] [2020-09-11 16:15:31,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:31,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:31,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:31,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:31,312 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-09-11 16:15:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:31,414 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-11 16:15:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:15:31,416 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:31,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:31,416 INFO L225 Difference]: With dead ends: 212 [2020-09-11 16:15:31,416 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 16:15:31,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:15:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 16:15:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-09-11 16:15:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-11 16:15:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-09-11 16:15:31,419 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-09-11 16:15:31,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:31,420 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-09-11 16:15:31,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:31,420 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-09-11 16:15:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:31,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:31,420 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:31,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:31,622 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:31,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 129 times [2020-09-11 16:15:31,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:31,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79472389] [2020-09-11 16:15:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:31,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79472389] [2020-09-11 16:15:31,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411590104] [2020-09-11 16:15:31,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:31,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:15:31,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:31,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:31,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:32,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:32,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:32,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204834564] [2020-09-11 16:15:32,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:32,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:32,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:32,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:32,113 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-09-11 16:15:32,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:32,268 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-09-11 16:15:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:15:32,269 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:32,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:32,270 INFO L225 Difference]: With dead ends: 217 [2020-09-11 16:15:32,270 INFO L226 Difference]: Without dead ends: 215 [2020-09-11 16:15:32,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:15:32,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-11 16:15:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-09-11 16:15:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-11 16:15:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-11 16:15:32,276 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-11 16:15:32,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:32,277 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-11 16:15:32,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-11 16:15:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:32,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:32,278 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:32,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:32,490 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:32,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:32,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 130 times [2020-09-11 16:15:32,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:32,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142688506] [2020-09-11 16:15:32,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:32,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142688506] [2020-09-11 16:15:32,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138699910] [2020-09-11 16:15:32,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:32,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:15:32,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:33,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:33,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:33,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773786499] [2020-09-11 16:15:33,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:33,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:33,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:33,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:33,012 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-11 16:15:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:33,291 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-11 16:15:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:15:33,292 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:33,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:33,293 INFO L225 Difference]: With dead ends: 227 [2020-09-11 16:15:33,293 INFO L226 Difference]: Without dead ends: 225 [2020-09-11 16:15:33,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:15:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-11 16:15:33,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-11 16:15:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-11 16:15:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-09-11 16:15:33,296 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-09-11 16:15:33,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:33,297 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-09-11 16:15:33,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:33,297 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-09-11 16:15:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:33,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:33,297 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:33,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:33,498 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:33,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 131 times [2020-09-11 16:15:33,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:33,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784468154] [2020-09-11 16:15:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:33,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784468154] [2020-09-11 16:15:33,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106081453] [2020-09-11 16:15:33,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:33,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:15:33,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:33,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:33,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:36,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:36,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:36,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589039926] [2020-09-11 16:15:36,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:36,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:36,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:36,156 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-09-11 16:15:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:36,519 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-11 16:15:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:15:36,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:36,521 INFO L225 Difference]: With dead ends: 225 [2020-09-11 16:15:36,521 INFO L226 Difference]: Without dead ends: 223 [2020-09-11 16:15:36,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:15:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-11 16:15:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 164. [2020-09-11 16:15:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-11 16:15:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-11 16:15:36,524 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-11 16:15:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:36,525 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-11 16:15:36,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-11 16:15:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:36,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:36,525 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:36,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-09-11 16:15:36,726 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:36,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:36,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 132 times [2020-09-11 16:15:36,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:36,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577241467] [2020-09-11 16:15:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:36,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577241467] [2020-09-11 16:15:36,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7911820] [2020-09-11 16:15:36,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:36,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:15:36,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:36,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:36,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:41,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:41,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:41,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200234169] [2020-09-11 16:15:41,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:41,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:41,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:41,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-09-11 16:15:41,626 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-11 16:15:45,839 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-11 16:15:46,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:46,088 INFO L93 Difference]: Finished difference Result 233 states and 545 transitions. [2020-09-11 16:15:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:15:46,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:46,090 INFO L225 Difference]: With dead ends: 233 [2020-09-11 16:15:46,090 INFO L226 Difference]: Without dead ends: 231 [2020-09-11 16:15:46,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=146, Invalid=359, Unknown=1, NotChecked=0, Total=506 [2020-09-11 16:15:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-11 16:15:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-09-11 16:15:46,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 16:15:46,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 16:15:46,094 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 16:15:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:46,095 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 16:15:46,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 16:15:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:46,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:46,095 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:46,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:46,304 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:46,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:46,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 133 times [2020-09-11 16:15:46,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:46,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443240017] [2020-09-11 16:15:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:46,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443240017] [2020-09-11 16:15:46,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597409053] [2020-09-11 16:15:46,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:46,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:46,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:46,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:46,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:46,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897300177] [2020-09-11 16:15:46,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:46,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:46,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:46,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:46,812 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-11 16:15:47,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:47,198 INFO L93 Difference]: Finished difference Result 225 states and 533 transitions. [2020-09-11 16:15:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:15:47,199 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:47,200 INFO L225 Difference]: With dead ends: 225 [2020-09-11 16:15:47,200 INFO L226 Difference]: Without dead ends: 223 [2020-09-11 16:15:47,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:15:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-11 16:15:47,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 160. [2020-09-11 16:15:47,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-11 16:15:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-09-11 16:15:47,204 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-09-11 16:15:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:47,204 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-09-11 16:15:47,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-09-11 16:15:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:47,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:47,205 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:47,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-11 16:15:47,406 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 134 times [2020-09-11 16:15:47,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:47,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373584042] [2020-09-11 16:15:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:47,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373584042] [2020-09-11 16:15:47,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993325915] [2020-09-11 16:15:47,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:47,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:15:47,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:47,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:47,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:47,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:47,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:47,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546407806] [2020-09-11 16:15:47,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:47,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:47,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:47,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:47,838 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-09-11 16:15:48,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:48,258 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-11 16:15:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:15:48,259 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:48,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:48,260 INFO L225 Difference]: With dead ends: 225 [2020-09-11 16:15:48,260 INFO L226 Difference]: Without dead ends: 223 [2020-09-11 16:15:48,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:15:48,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-11 16:15:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-09-11 16:15:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 16:15:48,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 16:15:48,263 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 16:15:48,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:48,264 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 16:15:48,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:48,264 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 16:15:48,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:48,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:48,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:48,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:48,465 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:48,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 135 times [2020-09-11 16:15:48,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:48,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528960588] [2020-09-11 16:15:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:48,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528960588] [2020-09-11 16:15:48,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400283467] [2020-09-11 16:15:48,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:48,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:15:48,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:48,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:48,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:48,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:48,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:48,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985683841] [2020-09-11 16:15:48,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:48,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:48,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:48,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:48,906 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-11 16:15:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:49,344 INFO L93 Difference]: Finished difference Result 235 states and 549 transitions. [2020-09-11 16:15:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:15:49,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:49,346 INFO L225 Difference]: With dead ends: 235 [2020-09-11 16:15:49,346 INFO L226 Difference]: Without dead ends: 233 [2020-09-11 16:15:49,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:15:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-11 16:15:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-09-11 16:15:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 16:15:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 16:15:49,350 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 16:15:49,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:49,350 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 16:15:49,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 16:15:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:49,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:49,351 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:49,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-11 16:15:49,551 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:49,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:49,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 136 times [2020-09-11 16:15:49,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:49,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577526622] [2020-09-11 16:15:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:49,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577526622] [2020-09-11 16:15:49,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596605479] [2020-09-11 16:15:49,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:49,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:15:49,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:49,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:49,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:49,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:49,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:49,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373750032] [2020-09-11 16:15:49,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:49,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:49,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:49,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:49,983 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-11 16:15:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:50,409 INFO L93 Difference]: Finished difference Result 230 states and 542 transitions. [2020-09-11 16:15:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:15:50,410 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:50,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:50,411 INFO L225 Difference]: With dead ends: 230 [2020-09-11 16:15:50,411 INFO L226 Difference]: Without dead ends: 228 [2020-09-11 16:15:50,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:15:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-11 16:15:50,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 163. [2020-09-11 16:15:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 16:15:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 16:15:50,414 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 16:15:50,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:50,415 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 16:15:50,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 16:15:50,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:50,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:50,415 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:50,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-11 16:15:50,623 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:50,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 137 times [2020-09-11 16:15:50,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:50,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414710741] [2020-09-11 16:15:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:50,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414710741] [2020-09-11 16:15:50,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262332276] [2020-09-11 16:15:50,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:50,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:15:50,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:50,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:50,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:51,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:51,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:51,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12705433] [2020-09-11 16:15:51,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:51,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:51,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:51,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:51,036 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-11 16:15:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:51,352 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-09-11 16:15:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:15:51,355 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:51,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:51,355 INFO L225 Difference]: With dead ends: 218 [2020-09-11 16:15:51,355 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 16:15:51,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:15:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 16:15:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-09-11 16:15:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-11 16:15:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-09-11 16:15:51,359 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-09-11 16:15:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:51,359 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-09-11 16:15:51,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-09-11 16:15:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:51,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:51,359 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:51,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:51,561 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:51,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:51,562 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 138 times [2020-09-11 16:15:51,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:51,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142512684] [2020-09-11 16:15:51,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:51,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142512684] [2020-09-11 16:15:51,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44096039] [2020-09-11 16:15:51,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:51,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:15:51,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:51,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:51,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:52,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:52,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:52,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111394806] [2020-09-11 16:15:52,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:52,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:52,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:52,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:52,045 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-09-11 16:15:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:52,191 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-09-11 16:15:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:15:52,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:52,193 INFO L225 Difference]: With dead ends: 208 [2020-09-11 16:15:52,193 INFO L226 Difference]: Without dead ends: 206 [2020-09-11 16:15:52,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:15:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-11 16:15:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-09-11 16:15:52,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-11 16:15:52,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-09-11 16:15:52,196 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-09-11 16:15:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:52,196 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-09-11 16:15:52,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-09-11 16:15:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:52,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:52,197 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:52,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:52,398 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:52,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:52,398 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 139 times [2020-09-11 16:15:52,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:52,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128482629] [2020-09-11 16:15:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:52,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128482629] [2020-09-11 16:15:52,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522745607] [2020-09-11 16:15:52,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:52,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:52,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:52,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:52,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:52,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750373135] [2020-09-11 16:15:52,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:52,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:52,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:52,870 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-09-11 16:15:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:53,059 INFO L93 Difference]: Finished difference Result 213 states and 504 transitions. [2020-09-11 16:15:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:15:53,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:53,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:53,061 INFO L225 Difference]: With dead ends: 213 [2020-09-11 16:15:53,061 INFO L226 Difference]: Without dead ends: 211 [2020-09-11 16:15:53,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:15:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-11 16:15:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2020-09-11 16:15:53,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 16:15:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-11 16:15:53,064 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-11 16:15:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:53,064 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-11 16:15:53,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-11 16:15:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:53,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:53,065 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:53,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-11 16:15:53,266 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:53,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:53,266 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 140 times [2020-09-11 16:15:53,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:53,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389301627] [2020-09-11 16:15:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:53,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389301627] [2020-09-11 16:15:53,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854982426] [2020-09-11 16:15:53,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:53,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:15:53,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:53,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:53,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:53,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:53,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:53,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968505743] [2020-09-11 16:15:53,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:53,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:53,754 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-11 16:15:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:54,080 INFO L93 Difference]: Finished difference Result 223 states and 524 transitions. [2020-09-11 16:15:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:15:54,081 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:54,082 INFO L225 Difference]: With dead ends: 223 [2020-09-11 16:15:54,082 INFO L226 Difference]: Without dead ends: 221 [2020-09-11 16:15:54,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:15:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-11 16:15:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 161. [2020-09-11 16:15:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-11 16:15:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-09-11 16:15:54,085 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-09-11 16:15:54,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:54,086 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-09-11 16:15:54,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-09-11 16:15:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:54,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:54,086 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:54,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:54,295 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:54,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:54,295 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 141 times [2020-09-11 16:15:54,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:54,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38492312] [2020-09-11 16:15:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:54,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38492312] [2020-09-11 16:15:54,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416446048] [2020-09-11 16:15:54,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:54,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:15:54,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:54,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:54,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:57,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:57,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:57,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573314479] [2020-09-11 16:15:57,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:57,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:57,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:57,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:57,499 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-09-11 16:15:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:57,921 INFO L93 Difference]: Finished difference Result 221 states and 520 transitions. [2020-09-11 16:15:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:15:57,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:57,923 INFO L225 Difference]: With dead ends: 221 [2020-09-11 16:15:57,923 INFO L226 Difference]: Without dead ends: 219 [2020-09-11 16:15:57,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:15:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-11 16:15:57,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 163. [2020-09-11 16:15:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 16:15:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-11 16:15:57,927 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-11 16:15:57,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:57,927 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-11 16:15:57,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-11 16:15:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:57,928 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:57,928 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:58,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:58,129 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:58,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:58,129 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 142 times [2020-09-11 16:15:58,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:58,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563444782] [2020-09-11 16:15:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:58,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563444782] [2020-09-11 16:15:58,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104347184] [2020-09-11 16:15:58,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:58,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:15:58,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:58,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:58,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:03,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:03,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:16:03,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73636914] [2020-09-11 16:16:03,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:16:03,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:03,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:16:03,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-09-11 16:16:03,087 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. Received shutdown request... [2020-09-11 16:16:05,305 WARN L210 SmtUtils]: Removed 3 from assertion stack [2020-09-11 16:16:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:16:05,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:05,506 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 16:16:05,511 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 16:16:05,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 04:16:05 BasicIcfg [2020-09-11 16:16:05,512 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 16:16:05,513 INFO L168 Benchmark]: Toolchain (without parser) took 264685.57 ms. Allocated memory was 138.9 MB in the beginning and 232.8 MB in the end (delta: 93.8 MB). Free memory was 99.4 MB in the beginning and 190.1 MB in the end (delta: -90.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-09-11 16:16:05,514 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 138.9 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 16:16:05,514 INFO L168 Benchmark]: CACSL2BoogieTranslator took 875.38 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 98.7 MB in the beginning and 162.9 MB in the end (delta: -64.2 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2020-09-11 16:16:05,515 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.28 ms. Allocated memory is still 202.9 MB. Free memory was 162.9 MB in the beginning and 160.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-09-11 16:16:05,515 INFO L168 Benchmark]: Boogie Preprocessor took 35.48 ms. Allocated memory is still 202.9 MB. Free memory was 160.8 MB in the beginning and 159.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-11 16:16:05,515 INFO L168 Benchmark]: RCFGBuilder took 483.17 ms. Allocated memory is still 202.9 MB. Free memory was 159.4 MB in the beginning and 138.8 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-09-11 16:16:05,516 INFO L168 Benchmark]: TraceAbstraction took 263220.26 ms. Allocated memory was 202.9 MB in the beginning and 232.8 MB in the end (delta: 29.9 MB). Free memory was 138.2 MB in the beginning and 190.1 MB in the end (delta: -51.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 16:16:05,517 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 138.9 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 875.38 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 98.7 MB in the beginning and 162.9 MB in the end (delta: -64.2 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 59.28 ms. Allocated memory is still 202.9 MB. Free memory was 162.9 MB in the beginning and 160.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.48 ms. Allocated memory is still 202.9 MB. Free memory was 160.8 MB in the beginning and 159.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 483.17 ms. Allocated memory is still 202.9 MB. Free memory was 159.4 MB in the beginning and 138.8 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 263220.26 ms. Allocated memory was 202.9 MB in the beginning and 232.8 MB in the end (delta: 29.9 MB). Free memory was 138.2 MB in the beginning and 190.1 MB in the end (delta: -51.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.2s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 576 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 988 CheckedPairsTotal, 47 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (163states) and FLOYD_HOARE automaton (currently 7 states, 17 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 41 for 2050ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 263.0s, OverallIterations: 176, TraceHistogramMax: 6, AutomataDifference: 146.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 2450 SDtfs, 17131 SDslu, 17274 SDs, 0 SdLazy, 13229 SolverSat, 4057 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 51.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4619 GetRequests, 830 SyntacticMatches, 151 SemanticMatches, 3637 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21344 ImplicationChecksByTransitivity, 146.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=162, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 175 MinimizatonAttempts, 7959 StatesRemovedByMinimization, 175 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 68.1s InterpolantComputationTime, 4296 NumberOfCodeBlocks, 4296 NumberOfCodeBlocksAsserted, 535 NumberOfCheckSat, 3951 ConstructedInterpolants, 8 QuantifiedInterpolants, 409961 SizeOfPredicates, 169 NumberOfNonLiveVariables, 14616 ConjunctsInSsa, 1641 ConjunctsInUnsatCore, 345 InterpolantComputations, 7 PerfectInterpolantSequences, 0/1656 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