/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 16:11:38,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 16:11:38,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 16:11:38,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 16:11:38,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 16:11:38,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 16:11:38,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 16:11:38,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 16:11:38,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 16:11:38,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 16:11:38,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 16:11:38,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 16:11:38,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 16:11:38,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 16:11:38,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 16:11:38,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 16:11:38,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 16:11:38,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 16:11:38,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 16:11:38,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 16:11:38,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 16:11:38,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 16:11:38,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 16:11:38,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 16:11:38,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 16:11:38,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 16:11:38,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 16:11:38,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 16:11:38,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 16:11:38,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 16:11:38,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 16:11:38,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 16:11:38,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 16:11:38,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 16:11:38,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 16:11:38,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 16:11:38,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 16:11:38,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 16:11:38,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 16:11:38,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 16:11:38,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 16:11:38,495 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 16:11:38,545 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 16:11:38,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 16:11:38,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 16:11:38,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 16:11:38,548 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 16:11:38,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 16:11:38,548 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 16:11:38,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 16:11:38,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 16:11:38,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 16:11:38,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 16:11:38,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 16:11:38,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 16:11:38,551 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 16:11:38,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 16:11:38,551 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 16:11:38,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 16:11:38,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 16:11:38,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 16:11:38,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 16:11:38,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 16:11:38,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 16:11:38,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 16:11:38,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 16:11:38,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 16:11:38,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 16:11:38,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 16:11:38,554 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 16:11:38,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 16:11:39,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 16:11:39,784 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 16:11:39,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 16:11:39,790 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 16:11:39,791 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 16:11:39,792 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-09-11 16:11:39,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e642cf53f/20a156b1d6414efbb2923e17d833ae30/FLAG5ef00b363 [2020-09-11 16:11:40,530 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 16:11:40,531 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-09-11 16:11:40,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e642cf53f/20a156b1d6414efbb2923e17d833ae30/FLAG5ef00b363 [2020-09-11 16:11:40,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e642cf53f/20a156b1d6414efbb2923e17d833ae30 [2020-09-11 16:11:40,730 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 16:11:40,737 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 16:11:40,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 16:11:40,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 16:11:40,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 16:11:40,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:11:40" (1/1) ... [2020-09-11 16:11:40,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43ff00c3 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 16:11:40,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:11:40" (1/1) ... [2020-09-11 16:11:40,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 16:11:40,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 16:11:41,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:11:41,355 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 16:11:41,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:11:41,476 INFO L208 MainTranslator]: Completed translation [2020-09-11 16:11:41,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:11:41 WrapperNode [2020-09-11 16:11:41,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 16:11:41,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 16:11:41,478 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 16:11:41,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 16:11:41,490 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 16:11:41,509 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 16:11:41,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 16:11:41,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 16:11:41,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 16:11:41,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 16:11:41,546 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 16:11:41,547 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 16:11:41,550 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 16:11:41,550 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 16:11:41,556 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 16:11:41,563 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 16:11:41,566 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 16:11:41,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 16:11:41,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 16:11:41,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 16:11:41,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 16:11:41,571 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 16:11:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 16:11:41,654 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 16:11:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 16:11:41,654 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 16:11:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 16:11:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 16:11:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 16:11:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 16:11:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 16:11:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 16:11:41,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 16:11:41,658 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 16:11:42,041 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 16:11:42,041 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 16:11:42,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:11:42 BoogieIcfgContainer [2020-09-11 16:11:42,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 16:11:42,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 16:11:42,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 16:11:42,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 16:11:42,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 04:11:40" (1/3) ... [2020-09-11 16:11:42,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16263dc7 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 16:11:42,053 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 16:11:42,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16263dc7 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 16:11:42,054 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 16:11:42,057 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-09-11 16:11:42,070 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 16:11:42,070 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 16:11:42,080 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 16:11:42,081 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 16:11:42,109 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,110 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,110 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,110 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,111 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,111 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,111 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,112 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,112 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,112 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,113 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,113 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,113 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,113 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,114 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,114 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,115 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,115 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,115 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,116 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,116 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,116 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,117 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,117 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,117 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,118 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,118 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,118 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,118 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,119 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,124 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,124 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,124 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,124 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,125 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,125 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,136 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,136 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,137 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,137 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,137 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,137 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:11:42,163 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 16:11:42,187 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 16:11:42,187 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 16:11:42,188 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 16:11:42,188 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 16:11:42,188 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 16:11:42,188 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 16:11:42,188 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 16:11:42,188 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 16:11:42,207 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-09-11 16:11:42,210 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-11 16:11:42,263 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-11 16:11:42,263 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 16:11:42,271 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 16:11:42,274 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-11 16:11:42,297 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-11 16:11:42,297 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 16:11:42,298 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 16:11:42,300 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-09-11 16:11:42,302 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 16:11:43,424 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-09-11 16:11:43,538 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-09-11 16:11:43,539 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-11 16:11:43,544 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 16:11:43,557 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 16:11:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 16:11:43,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 16:11:43,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:43,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 16:11:43,569 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:43,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-09-11 16:11:43,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:43,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020386124] [2020-09-11 16:11:43,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:43,875 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 16:11:43,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020386124] [2020-09-11 16:11:43,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:43,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 16:11:43,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261301996] [2020-09-11 16:11:43,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 16:11:43,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:43,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 16:11:43,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 16:11:43,922 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 16:11:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:44,012 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-09-11 16:11:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 16:11:44,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 16:11:44,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:44,031 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:11:44,031 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:11:44,033 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 16:11:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:11:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-11 16:11:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:11:44,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-09-11 16:11:44,083 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-09-11 16:11:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:44,084 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-09-11 16:11:44,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 16:11:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-09-11 16:11:44,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 16:11:44,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:44,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:44,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 16:11:44,086 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:44,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:44,087 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-09-11 16:11:44,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:44,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254627129] [2020-09-11 16:11:44,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:44,203 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 16:11:44,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254627129] [2020-09-11 16:11:44,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:44,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:11:44,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123446201] [2020-09-11 16:11:44,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 16:11:44,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:44,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 16:11:44,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:11:44,207 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-09-11 16:11:44,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:44,267 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-09-11 16:11:44,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:11:44,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 16:11:44,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:44,269 INFO L225 Difference]: With dead ends: 80 [2020-09-11 16:11:44,270 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 16:11:44,271 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 16:11:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 16:11:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-09-11 16:11:44,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 16:11:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-11 16:11:44,282 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-09-11 16:11:44,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:44,283 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-11 16:11:44,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 16:11:44,284 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-11 16:11:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 16:11:44,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:44,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:44,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 16:11:44,286 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:44,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:44,286 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-09-11 16:11:44,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:44,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983455485] [2020-09-11 16:11:44,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:44,415 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 16:11:44,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983455485] [2020-09-11 16:11:44,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:44,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:11:44,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721593243] [2020-09-11 16:11:44,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 16:11:44,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:44,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 16:11:44,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:11:44,420 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-09-11 16:11:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:44,465 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-09-11 16:11:44,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 16:11:44,465 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 16:11:44,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:44,467 INFO L225 Difference]: With dead ends: 73 [2020-09-11 16:11:44,467 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 16:11:44,468 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 16:11:44,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 16:11:44,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-11 16:11:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:11:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-09-11 16:11:44,479 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-09-11 16:11:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:44,479 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-09-11 16:11:44,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 16:11:44,479 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-09-11 16:11:44,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 16:11:44,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:44,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:44,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 16:11:44,481 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:44,482 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-09-11 16:11:44,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:44,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803930757] [2020-09-11 16:11:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:44,578 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 16:11:44,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803930757] [2020-09-11 16:11:44,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:44,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:11:44,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127140348] [2020-09-11 16:11:44,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 16:11:44,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:44,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 16:11:44,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:11:44,581 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-09-11 16:11:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:44,649 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-09-11 16:11:44,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:11:44,650 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 16:11:44,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:44,651 INFO L225 Difference]: With dead ends: 86 [2020-09-11 16:11:44,652 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 16:11:44,652 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 16:11:44,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 16:11:44,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-11 16:11:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:11:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-09-11 16:11:44,662 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-09-11 16:11:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:44,662 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-09-11 16:11:44,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 16:11:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-09-11 16:11:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 16:11:44,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:44,664 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:44,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 16:11:44,665 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:44,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:44,665 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-09-11 16:11:44,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:44,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381304458] [2020-09-11 16:11:44,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:44,763 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 16:11:44,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381304458] [2020-09-11 16:11:44,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459130698] [2020-09-11 16:11:44,765 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 16:11:44,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:44,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:11:44,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:44,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:11:44,966 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 16:11:44,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:44,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-09-11 16:11:44,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775569572] [2020-09-11 16:11:44,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:11:44,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:44,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:11:44,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:11:44,968 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-09-11 16:11:45,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:45,045 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-09-11 16:11:45,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:45,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-09-11 16:11:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:45,047 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:11:45,047 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:11:45,047 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 16:11:45,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:11:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-09-11 16:11:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:11:45,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-09-11 16:11:45,056 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-09-11 16:11:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:45,057 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-09-11 16:11:45,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:11:45,057 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-09-11 16:11:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 16:11:45,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:45,058 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:45,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:45,275 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:45,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:45,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-09-11 16:11:45,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:45,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109659124] [2020-09-11 16:11:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:45,365 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 16:11:45,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109659124] [2020-09-11 16:11:45,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014898735] [2020-09-11 16:11:45,367 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 16:11:45,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:11:45,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:45,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:11:45,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:45,500 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 16:11:45,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:45,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 16:11:45,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538478299] [2020-09-11 16:11:45,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:11:45,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:45,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:11:45,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:11:45,502 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-09-11 16:11:45,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:45,563 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 16:11:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:11:45,564 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 16:11:45,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:45,565 INFO L225 Difference]: With dead ends: 88 [2020-09-11 16:11:45,565 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:11:45,565 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 16:11:45,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:11:45,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-09-11 16:11:45,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:11:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 183 transitions. [2020-09-11 16:11:45,573 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 183 transitions. Word has length 9 [2020-09-11 16:11:45,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:45,574 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 183 transitions. [2020-09-11 16:11:45,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:11:45,574 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 183 transitions. [2020-09-11 16:11:45,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 16:11:45,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:45,575 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:45,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:45,792 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:45,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:45,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-09-11 16:11:45,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:45,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744600439] [2020-09-11 16:11:45,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:45,901 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 16:11:45,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744600439] [2020-09-11 16:11:45,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026022617] [2020-09-11 16:11:45,902 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 16:11:45,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:11:45,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:45,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:11:45,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:46,090 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 16:11:46,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:46,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 16:11:46,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009177304] [2020-09-11 16:11:46,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:11:46,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:46,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:11:46,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:11:46,094 INFO L87 Difference]: Start difference. First operand 76 states and 183 transitions. Second operand 9 states. [2020-09-11 16:11:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:46,188 INFO L93 Difference]: Finished difference Result 94 states and 221 transitions. [2020-09-11 16:11:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:11:46,189 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 16:11:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:46,190 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:11:46,190 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:11:46,191 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 16:11:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:11:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2020-09-11 16:11:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 16:11:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 190 transitions. [2020-09-11 16:11:46,208 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 190 transitions. Word has length 9 [2020-09-11 16:11:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:46,209 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 190 transitions. [2020-09-11 16:11:46,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:11:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 190 transitions. [2020-09-11 16:11:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 16:11:46,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:46,212 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:46,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:46,428 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:46,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-09-11 16:11:46,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:46,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504216926] [2020-09-11 16:11:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:46,494 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 16:11:46,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504216926] [2020-09-11 16:11:46,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114859931] [2020-09-11 16:11:46,495 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 16:11:46,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:46,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:46,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:11:46,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:46,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:11:46,618 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 16:11:46,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:46,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 16:11:46,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722640125] [2020-09-11 16:11:46,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:11:46,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:46,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:11:46,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:11:46,620 INFO L87 Difference]: Start difference. First operand 78 states and 190 transitions. Second operand 9 states. [2020-09-11 16:11:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:46,773 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-11 16:11:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:46,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 16:11:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:46,776 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:11:46,776 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:11:46,776 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 16:11:46,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:11:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2020-09-11 16:11:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 16:11:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-09-11 16:11:46,790 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 9 [2020-09-11 16:11:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:46,791 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-09-11 16:11:46,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:11:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-09-11 16:11:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:46,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:46,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:47,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:47,010 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:47,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:47,010 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 1 times [2020-09-11 16:11:47,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:47,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910867950] [2020-09-11 16:11:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:47,132 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 16:11:47,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910867950] [2020-09-11 16:11:47,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:47,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:11:47,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117229277] [2020-09-11 16:11:47,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:11:47,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:47,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:11:47,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:11:47,135 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-09-11 16:11:47,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:47,190 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-09-11 16:11:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:11:47,190 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:11:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:47,192 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:11:47,192 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:11:47,192 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 16:11:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:11:47,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-09-11 16:11:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 16:11:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-09-11 16:11:47,211 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-09-11 16:11:47,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:47,211 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-09-11 16:11:47,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:11:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-09-11 16:11:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:47,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:47,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:47,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-11 16:11:47,218 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:47,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:47,219 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 2 times [2020-09-11 16:11:47,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:47,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224690886] [2020-09-11 16:11:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:47,356 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 16:11:47,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224690886] [2020-09-11 16:11:47,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:47,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:11:47,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194211571] [2020-09-11 16:11:47,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:11:47,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:47,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:11:47,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:11:47,362 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-09-11 16:11:47,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:47,445 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-11 16:11:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:47,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:11:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:47,447 INFO L225 Difference]: With dead ends: 105 [2020-09-11 16:11:47,447 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:11:47,447 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 16:11:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:11:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-11 16:11:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:11:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-09-11 16:11:47,453 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-09-11 16:11:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:47,453 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-09-11 16:11:47,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:11:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-09-11 16:11:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:47,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:47,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:47,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-11 16:11:47,455 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:47,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:47,455 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 3 times [2020-09-11 16:11:47,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:47,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105945934] [2020-09-11 16:11:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:47,536 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 16:11:47,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105945934] [2020-09-11 16:11:47,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:11:47,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:11:47,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221641831] [2020-09-11 16:11:47,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:11:47,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:47,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:11:47,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:11:47,539 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-09-11 16:11:47,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:47,625 INFO L93 Difference]: Finished difference Result 105 states and 248 transitions. [2020-09-11 16:11:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:47,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:11:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:47,627 INFO L225 Difference]: With dead ends: 105 [2020-09-11 16:11:47,627 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:11:47,628 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 16:11:47,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:11:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-11 16:11:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:11:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-09-11 16:11:47,633 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-09-11 16:11:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:47,633 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-09-11 16:11:47,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:11:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-09-11 16:11:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:47,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:47,634 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:47,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-11 16:11:47,635 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-09-11 16:11:47,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:47,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460895893] [2020-09-11 16:11:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:47,713 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 16:11:47,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460895893] [2020-09-11 16:11:47,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314468280] [2020-09-11 16:11:47,714 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 16:11:47,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:11:47,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:47,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:47,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:47,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:11:47,861 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 16:11:47,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:47,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-11 16:11:47,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202243989] [2020-09-11 16:11:47,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:11:47,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:47,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:11:47,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:11:47,863 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-09-11 16:11:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:47,972 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-09-11 16:11:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:11:47,972 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-09-11 16:11:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:47,974 INFO L225 Difference]: With dead ends: 122 [2020-09-11 16:11:47,974 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 16:11:47,975 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 16:11:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 16:11:47,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-09-11 16:11:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 16:11:47,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-09-11 16:11:47,985 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-09-11 16:11:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:47,985 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-09-11 16:11:47,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:11:47,985 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-09-11 16:11:47,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:47,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:47,989 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:48,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-11 16:11:48,190 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:48,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:48,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-09-11 16:11:48,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:48,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406355921] [2020-09-11 16:11:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:48,262 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 16:11:48,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406355921] [2020-09-11 16:11:48,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537681075] [2020-09-11 16:11:48,263 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 16:11:48,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:11:48,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:48,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:48,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:48,416 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 16:11:48,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:48,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:48,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012920442] [2020-09-11 16:11:48,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:48,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:48,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:48,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:48,420 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-09-11 16:11:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:48,493 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-11 16:11:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:11:48,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 16:11:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:48,495 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:11:48,495 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:11:48,496 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 16:11:48,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:11:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-11 16:11:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-11 16:11:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-09-11 16:11:48,500 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-09-11 16:11:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:48,500 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-09-11 16:11:48,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:48,500 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-09-11 16:11:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:48,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:48,501 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:48,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:48,713 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:48,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-09-11 16:11:48,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:48,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285550484] [2020-09-11 16:11:48,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:48,787 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 16:11:48,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285550484] [2020-09-11 16:11:48,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940782573] [2020-09-11 16:11:48,788 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 16:11:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:48,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:48,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:48,959 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 16:11:48,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:48,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:48,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755487] [2020-09-11 16:11:48,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:48,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:48,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:48,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:48,962 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-09-11 16:11:49,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:49,103 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-09-11 16:11:49,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:11:49,104 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 16:11:49,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:49,105 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:11:49,105 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:11:49,106 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 16:11:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:11:49,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-09-11 16:11:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-11 16:11:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-09-11 16:11:49,110 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-09-11 16:11:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:49,110 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-09-11 16:11:49,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-09-11 16:11:49,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:49,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:49,111 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:49,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-11 16:11:49,312 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:49,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-09-11 16:11:49,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:49,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558507527] [2020-09-11 16:11:49,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:49,384 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 16:11:49,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558507527] [2020-09-11 16:11:49,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050121090] [2020-09-11 16:11:49,385 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 16:11:49,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:49,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:49,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:49,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:49,545 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 16:11:49,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:49,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:49,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719559874] [2020-09-11 16:11:49,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:49,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:49,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:49,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:49,548 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-09-11 16:11:49,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:49,715 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-09-11 16:11:49,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:11:49,715 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 16:11:49,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:49,716 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:11:49,716 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 16:11:49,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:11:49,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 16:11:49,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-09-11 16:11:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-11 16:11:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-09-11 16:11:49,721 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-09-11 16:11:49,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:49,721 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-09-11 16:11:49,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-09-11 16:11:49,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:11:49,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:49,722 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:49,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 16:11:49,935 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:49,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-09-11 16:11:49,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:49,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200629175] [2020-09-11 16:11:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:50,026 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 16:11:50,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200629175] [2020-09-11 16:11:50,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523405196] [2020-09-11 16:11:50,027 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 16:11:50,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:11:50,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:50,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:50,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:50,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:11:50,159 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 16:11:50,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:50,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:50,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816439214] [2020-09-11 16:11:50,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:50,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:50,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:50,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:50,162 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-09-11 16:11:50,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:50,389 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-09-11 16:11:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:11:50,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 16:11:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:50,391 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:11:50,392 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:11:50,392 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 16:11:50,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:11:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-09-11 16:11:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-11 16:11:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-11 16:11:50,400 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-09-11 16:11:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:50,400 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-11 16:11:50,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-11 16:11:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:50,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:50,401 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:50,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 16:11:50,602 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:50,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:50,603 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 4 times [2020-09-11 16:11:50,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:50,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147458620] [2020-09-11 16:11:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:50,698 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 16:11:50,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147458620] [2020-09-11 16:11:50,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526783859] [2020-09-11 16:11:50,699 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 16:11:50,760 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 16:11:50,841 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 16:11:50,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:50,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:50,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113371069] [2020-09-11 16:11:50,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:50,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:50,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:50,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:50,843 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-09-11 16:11:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:50,884 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-09-11 16:11:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:11:50,885 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:50,886 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:11:50,886 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:11:50,887 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 16:11:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:11:50,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-09-11 16:11:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-11 16:11:50,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-11 16:11:50,890 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-09-11 16:11:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:50,891 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-11 16:11:50,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:50,891 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-11 16:11:50,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:50,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:50,892 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:51,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 16:11:51,104 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:51,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:51,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 5 times [2020-09-11 16:11:51,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:51,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159959920] [2020-09-11 16:11:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:51,182 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 16:11:51,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159959920] [2020-09-11 16:11:51,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354308758] [2020-09-11 16:11:51,194 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 16:11:51,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:51,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:51,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:51,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:51,349 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 16:11:51,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:51,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:51,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134329882] [2020-09-11 16:11:51,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:51,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:51,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:51,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:51,353 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-09-11 16:11:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:51,411 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-09-11 16:11:51,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:11:51,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:51,412 INFO L225 Difference]: With dead ends: 118 [2020-09-11 16:11:51,412 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 16:11:51,413 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 16:11:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 16:11:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-09-11 16:11:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-11 16:11:51,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-09-11 16:11:51,417 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-09-11 16:11:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:51,417 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-09-11 16:11:51,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-09-11 16:11:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:51,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:51,418 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:51,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 16:11:51,628 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:51,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:51,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 6 times [2020-09-11 16:11:51,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:51,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743159309] [2020-09-11 16:11:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:51,700 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 16:11:51,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743159309] [2020-09-11 16:11:51,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998515915] [2020-09-11 16:11:51,701 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 16:11:51,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:11:51,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:51,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:51,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:51,830 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 16:11:51,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:51,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:51,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454334828] [2020-09-11 16:11:51,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:51,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:51,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:51,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:51,832 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-09-11 16:11:51,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:51,961 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-09-11 16:11:51,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:51,961 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:51,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:51,963 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:11:51,963 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 16:11:51,964 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 16:11:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 16:11:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2020-09-11 16:11:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-11 16:11:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-09-11 16:11:51,969 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-09-11 16:11:51,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:51,969 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-09-11 16:11:51,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-09-11 16:11:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:51,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:51,971 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:52,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:52,182 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:52,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 7 times [2020-09-11 16:11:52,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:52,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967537741] [2020-09-11 16:11:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:52,289 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 16:11:52,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967537741] [2020-09-11 16:11:52,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738760741] [2020-09-11 16:11:52,290 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 16:11:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:52,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:52,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:52,439 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 16:11:52,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:52,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:52,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820602025] [2020-09-11 16:11:52,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:52,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:52,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:52,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:52,441 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-09-11 16:11:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:52,510 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-09-11 16:11:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:11:52,511 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:52,512 INFO L225 Difference]: With dead ends: 122 [2020-09-11 16:11:52,512 INFO L226 Difference]: Without dead ends: 120 [2020-09-11 16:11:52,513 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 16:11:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-11 16:11:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-09-11 16:11:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-11 16:11:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-09-11 16:11:52,517 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-09-11 16:11:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:52,518 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-09-11 16:11:52,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-09-11 16:11:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:52,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:52,519 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:52,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-09-11 16:11:52,720 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:52,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 8 times [2020-09-11 16:11:52,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:52,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311293986] [2020-09-11 16:11:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:52,814 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 16:11:52,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311293986] [2020-09-11 16:11:52,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139987450] [2020-09-11 16:11:52,814 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 16:11:52,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:52,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:52,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:52,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:52,956 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 16:11:52,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:52,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:52,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989108377] [2020-09-11 16:11:52,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:52,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:52,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:52,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:52,958 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-09-11 16:11:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:53,036 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-09-11 16:11:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:53,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:53,038 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:11:53,038 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 16:11:53,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:11:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 16:11:53,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-11 16:11:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 16:11:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-09-11 16:11:53,043 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-09-11 16:11:53,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:53,043 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-09-11 16:11:53,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-09-11 16:11:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:53,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:53,044 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:53,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:53,254 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:53,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 9 times [2020-09-11 16:11:53,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:53,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347741958] [2020-09-11 16:11:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:53,341 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 16:11:53,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347741958] [2020-09-11 16:11:53,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771268418] [2020-09-11 16:11:53,341 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 16:11:53,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:11:53,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:53,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:53,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:53,500 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 16:11:53,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:53,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:53,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337369457] [2020-09-11 16:11:53,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:53,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:53,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:53,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:53,502 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-09-11 16:11:53,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:53,583 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-11 16:11:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:11:53,584 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:53,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:53,585 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:11:53,585 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 16:11:53,585 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 16:11:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 16:11:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-09-11 16:11:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-11 16:11:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-09-11 16:11:53,589 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-09-11 16:11:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:53,589 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-09-11 16:11:53,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:53,590 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-09-11 16:11:53,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:53,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:53,590 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:53,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-11 16:11:53,799 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:53,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 10 times [2020-09-11 16:11:53,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:53,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944032323] [2020-09-11 16:11:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:53,868 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 16:11:53,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944032323] [2020-09-11 16:11:53,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440314572] [2020-09-11 16:11:53,868 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 16:11:53,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:11:53,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:53,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:53,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:54,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:11:54,059 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 16:11:54,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:54,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:54,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751053344] [2020-09-11 16:11:54,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:54,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:54,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:54,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:54,062 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-09-11 16:11:54,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:54,314 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-11 16:11:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:11:54,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:54,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:54,316 INFO L225 Difference]: With dead ends: 133 [2020-09-11 16:11:54,316 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 16:11:54,316 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 16:11:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 16:11:54,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-09-11 16:11:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-11 16:11:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-09-11 16:11:54,320 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-09-11 16:11:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:54,320 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-09-11 16:11:54,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-09-11 16:11:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:54,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:54,321 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:54,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:54,534 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:54,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:54,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 11 times [2020-09-11 16:11:54,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:54,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299347187] [2020-09-11 16:11:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:54,629 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 16:11:54,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299347187] [2020-09-11 16:11:54,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928806555] [2020-09-11 16:11:54,630 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 16:11:54,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:54,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:54,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:54,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:54,752 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 16:11:54,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:54,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:54,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745662626] [2020-09-11 16:11:54,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:54,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:54,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:54,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:54,754 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-09-11 16:11:54,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:54,915 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-11 16:11:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:11:54,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:54,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:54,918 INFO L225 Difference]: With dead ends: 127 [2020-09-11 16:11:54,918 INFO L226 Difference]: Without dead ends: 125 [2020-09-11 16:11:54,919 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 16:11:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-11 16:11:54,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-09-11 16:11:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-11 16:11:54,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-11 16:11:54,923 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-11 16:11:54,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:54,923 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-11 16:11:54,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:54,923 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-11 16:11:54,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:54,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:54,924 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:55,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 16:11:55,125 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:55,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 12 times [2020-09-11 16:11:55,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:55,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348862032] [2020-09-11 16:11:55,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:55,223 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 16:11:55,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348862032] [2020-09-11 16:11:55,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104362378] [2020-09-11 16:11:55,224 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 16:11:55,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:11:55,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:55,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:55,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:55,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:11:55,360 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 16:11:55,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:55,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:55,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269441112] [2020-09-11 16:11:55,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:55,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:55,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:55,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:55,363 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-11 16:11:55,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:55,623 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-09-11 16:11:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:11:55,623 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:55,625 INFO L225 Difference]: With dead ends: 141 [2020-09-11 16:11:55,625 INFO L226 Difference]: Without dead ends: 136 [2020-09-11 16:11:55,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:11:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-11 16:11:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-09-11 16:11:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-11 16:11:55,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-11 16:11:55,630 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-11 16:11:55,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:55,630 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-11 16:11:55,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:55,630 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-11 16:11:55,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:55,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:55,631 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:55,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-11 16:11:55,843 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:55,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 13 times [2020-09-11 16:11:55,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:55,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850211379] [2020-09-11 16:11:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:55,910 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 16:11:55,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850211379] [2020-09-11 16:11:55,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051842987] [2020-09-11 16:11:55,910 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 16:11:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:55,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:55,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:56,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:11:56,052 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 16:11:56,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:56,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:56,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114285338] [2020-09-11 16:11:56,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:56,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:56,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:56,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:56,055 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-11 16:11:56,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:56,293 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-11 16:11:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:11:56,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:56,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:56,295 INFO L225 Difference]: With dead ends: 136 [2020-09-11 16:11:56,295 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 16:11:56,296 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 16:11:56,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 16:11:56,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-11 16:11:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 16:11:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-09-11 16:11:56,301 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-09-11 16:11:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:56,301 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-09-11 16:11:56,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-09-11 16:11:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:56,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:56,302 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:56,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 16:11:56,509 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:56,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:56,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 14 times [2020-09-11 16:11:56,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:56,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682223766] [2020-09-11 16:11:56,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:56,581 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 16:11:56,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682223766] [2020-09-11 16:11:56,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381394744] [2020-09-11 16:11:56,582 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 16:11:56,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:56,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:56,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:56,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:56,706 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 16:11:56,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:56,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:56,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889082038] [2020-09-11 16:11:56,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:56,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:56,708 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-09-11 16:11:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:56,865 INFO L93 Difference]: Finished difference Result 128 states and 297 transitions. [2020-09-11 16:11:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:11:56,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:56,867 INFO L225 Difference]: With dead ends: 128 [2020-09-11 16:11:56,867 INFO L226 Difference]: Without dead ends: 126 [2020-09-11 16:11:56,867 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 16:11:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-11 16:11:56,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-09-11 16:11:56,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 16:11:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-11 16:11:56,872 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-11 16:11:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:56,872 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-11 16:11:56,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-11 16:11:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:56,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:56,873 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:57,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-11 16:11:57,085 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:57,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 15 times [2020-09-11 16:11:57,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:57,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256717157] [2020-09-11 16:11:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:57,153 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 16:11:57,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256717157] [2020-09-11 16:11:57,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85034099] [2020-09-11 16:11:57,154 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 16:11:57,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:11:57,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:57,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:57,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:57,281 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 16:11:57,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:57,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:57,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257211041] [2020-09-11 16:11:57,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:57,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:57,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:57,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:57,286 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-11 16:11:57,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:57,563 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2020-09-11 16:11:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:11:57,564 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:57,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:57,565 INFO L225 Difference]: With dead ends: 126 [2020-09-11 16:11:57,566 INFO L226 Difference]: Without dead ends: 124 [2020-09-11 16:11:57,566 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 16:11:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-11 16:11:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2020-09-11 16:11:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 16:11:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-11 16:11:57,571 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-11 16:11:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:57,571 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-11 16:11:57,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-11 16:11:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:57,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:57,572 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:57,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 16:11:57,784 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:57,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 16 times [2020-09-11 16:11:57,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:57,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719366404] [2020-09-11 16:11:57,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:57,864 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 16:11:57,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719366404] [2020-09-11 16:11:57,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157205174] [2020-09-11 16:11:57,865 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 16:11:57,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:11:57,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:57,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:57,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:57,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:11:57,999 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 16:11:57,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:58,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:58,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091115837] [2020-09-11 16:11:58,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:58,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:58,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:58,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:58,001 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-11 16:11:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:58,294 INFO L93 Difference]: Finished difference Result 136 states and 323 transitions. [2020-09-11 16:11:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:11:58,295 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:58,297 INFO L225 Difference]: With dead ends: 136 [2020-09-11 16:11:58,297 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 16:11:58,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:11:58,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 16:11:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-11 16:11:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 16:11:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-11 16:11:58,302 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-11 16:11:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:58,303 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-11 16:11:58,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-11 16:11:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:58,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:58,303 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:58,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:58,515 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:58,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:58,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 17 times [2020-09-11 16:11:58,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:58,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241774230] [2020-09-11 16:11:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:58,592 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 16:11:58,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241774230] [2020-09-11 16:11:58,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92546637] [2020-09-11 16:11:58,593 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 16:11:58,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:11:58,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:58,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:58,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:58,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:11:58,705 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 16:11:58,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:58,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:58,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900385708] [2020-09-11 16:11:58,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:58,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:58,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:58,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:58,708 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-11 16:11:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:59,089 INFO L93 Difference]: Finished difference Result 138 states and 325 transitions. [2020-09-11 16:11:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:11:59,089 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:59,091 INFO L225 Difference]: With dead ends: 138 [2020-09-11 16:11:59,091 INFO L226 Difference]: Without dead ends: 133 [2020-09-11 16:11:59,092 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 16:11:59,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-11 16:11:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2020-09-11 16:11:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 16:11:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-11 16:11:59,096 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-11 16:11:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:59,096 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-11 16:11:59,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-11 16:11:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:59,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:59,097 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:11:59,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:11:59,308 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:11:59,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:11:59,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 18 times [2020-09-11 16:11:59,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:11:59,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864452321] [2020-09-11 16:11:59,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:11:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:11:59,381 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 16:11:59,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864452321] [2020-09-11 16:11:59,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224138931] [2020-09-11 16:11:59,382 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 16:11:59,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:11:59,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:11:59,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:11:59,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:11:59,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:11:59,516 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 16:11:59,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:11:59,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 16:11:59,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974109723] [2020-09-11 16:11:59,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:11:59,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:11:59,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:11:59,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:11:59,519 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-11 16:11:59,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:11:59,806 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-11 16:11:59,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:11:59,807 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 16:11:59,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:11:59,808 INFO L225 Difference]: With dead ends: 136 [2020-09-11 16:11:59,808 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 16:11:59,809 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 16:11:59,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 16:11:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 98. [2020-09-11 16:11:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-11 16:11:59,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-09-11 16:11:59,814 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-09-11 16:11:59,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:11:59,815 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-09-11 16:11:59,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:11:59,815 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-09-11 16:11:59,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:11:59,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:11:59,816 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:00,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:00,029 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:00,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:00,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-09-11 16:12:00,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:00,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442467880] [2020-09-11 16:12:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:00,123 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 16:12:00,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442467880] [2020-09-11 16:12:00,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080156796] [2020-09-11 16:12:00,124 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 16:12:00,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:00,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:00,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:00,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:00,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:00,311 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 16:12:00,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:00,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-09-11 16:12:00,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476831073] [2020-09-11 16:12:00,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:12:00,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:00,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:12:00,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:12:00,313 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-09-11 16:12:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:00,462 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-09-11 16:12:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:00,462 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-09-11 16:12:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:00,464 INFO L225 Difference]: With dead ends: 143 [2020-09-11 16:12:00,464 INFO L226 Difference]: Without dead ends: 138 [2020-09-11 16:12:00,464 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 16:12:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-11 16:12:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-09-11 16:12:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-11 16:12:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-09-11 16:12:00,469 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-09-11 16:12:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:00,469 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-09-11 16:12:00,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:12:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-09-11 16:12:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:12:00,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:00,470 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:00,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 16:12:00,681 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:00,682 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-09-11 16:12:00,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:00,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953945732] [2020-09-11 16:12:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:00,760 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 16:12:00,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953945732] [2020-09-11 16:12:00,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994400829] [2020-09-11 16:12:00,761 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 16:12:00,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:00,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:00,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:00,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:00,914 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 16:12:00,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:00,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:00,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780667929] [2020-09-11 16:12:00,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:00,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:00,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:00,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:00,917 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-09-11 16:12:01,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:01,038 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-11 16:12:01,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:12:01,039 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 16:12:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:01,040 INFO L225 Difference]: With dead ends: 134 [2020-09-11 16:12:01,040 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 16:12:01,041 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 16:12:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 16:12:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2020-09-11 16:12:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-11 16:12:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-11 16:12:01,044 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-11 16:12:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:01,045 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-11 16:12:01,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-11 16:12:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:12:01,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:01,046 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:01,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:01,256 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:01,257 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-09-11 16:12:01,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:01,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410281515] [2020-09-11 16:12:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:01,335 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 16:12:01,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410281515] [2020-09-11 16:12:01,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613129761] [2020-09-11 16:12:01,336 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 16:12:01,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:12:01,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:01,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:01,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:01,510 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 16:12:01,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:01,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:01,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472965658] [2020-09-11 16:12:01,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:01,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:01,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:01,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:01,512 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-11 16:12:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:01,693 INFO L93 Difference]: Finished difference Result 145 states and 336 transitions. [2020-09-11 16:12:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:01,694 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 16:12:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:01,695 INFO L225 Difference]: With dead ends: 145 [2020-09-11 16:12:01,695 INFO L226 Difference]: Without dead ends: 142 [2020-09-11 16:12:01,695 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 16:12:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-11 16:12:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2020-09-11 16:12:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-11 16:12:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-11 16:12:01,699 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-11 16:12:01,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:01,699 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-11 16:12:01,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:01,699 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-11 16:12:01,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:12:01,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:01,700 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:01,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 16:12:01,910 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:01,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:01,911 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-09-11 16:12:01,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:01,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455521359] [2020-09-11 16:12:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:01,980 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 16:12:01,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455521359] [2020-09-11 16:12:01,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790351015] [2020-09-11 16:12:01,981 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 16:12:02,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:12:02,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:02,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:02,143 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 16:12:02,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:02,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:02,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495383011] [2020-09-11 16:12:02,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:02,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:02,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:02,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:02,145 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-11 16:12:02,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:02,391 INFO L93 Difference]: Finished difference Result 147 states and 342 transitions. [2020-09-11 16:12:02,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:02,392 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 16:12:02,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:02,393 INFO L225 Difference]: With dead ends: 147 [2020-09-11 16:12:02,393 INFO L226 Difference]: Without dead ends: 144 [2020-09-11 16:12:02,393 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 16:12:02,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-11 16:12:02,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-09-11 16:12:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-11 16:12:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-09-11 16:12:02,397 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-09-11 16:12:02,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:02,398 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-09-11 16:12:02,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-09-11 16:12:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:12:02,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:02,400 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:02,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:02,609 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:02,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:02,610 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-09-11 16:12:02,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:02,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716345359] [2020-09-11 16:12:02,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:02,700 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 16:12:02,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716345359] [2020-09-11 16:12:02,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6981335] [2020-09-11 16:12:02,701 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 16:12:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:02,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:02,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:02,855 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 16:12:02,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:02,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:02,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14592232] [2020-09-11 16:12:02,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:02,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:02,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:02,857 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-09-11 16:12:03,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:03,063 INFO L93 Difference]: Finished difference Result 143 states and 336 transitions. [2020-09-11 16:12:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:03,064 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 16:12:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:03,065 INFO L225 Difference]: With dead ends: 143 [2020-09-11 16:12:03,065 INFO L226 Difference]: Without dead ends: 140 [2020-09-11 16:12:03,066 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 16:12:03,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-11 16:12:03,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-09-11 16:12:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-11 16:12:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-09-11 16:12:03,070 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-09-11 16:12:03,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:03,070 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-09-11 16:12:03,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:03,071 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-09-11 16:12:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:12:03,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:03,071 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:03,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 16:12:03,282 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:03,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:03,283 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-09-11 16:12:03,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:03,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124546141] [2020-09-11 16:12:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:03,354 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 16:12:03,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124546141] [2020-09-11 16:12:03,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173040210] [2020-09-11 16:12:03,355 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 16:12:03,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:03,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:03,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:03,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:03,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:03,486 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 16:12:03,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:03,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:03,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503792524] [2020-09-11 16:12:03,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:03,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:03,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:03,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:03,489 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-09-11 16:12:03,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:03,787 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-11 16:12:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:03,787 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 16:12:03,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:03,789 INFO L225 Difference]: With dead ends: 150 [2020-09-11 16:12:03,789 INFO L226 Difference]: Without dead ends: 144 [2020-09-11 16:12:03,790 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 16:12:03,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-11 16:12:03,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-09-11 16:12:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-11 16:12:03,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-09-11 16:12:03,794 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-09-11 16:12:03,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:03,794 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-09-11 16:12:03,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-09-11 16:12:03,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:03,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:03,795 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:04,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:04,002 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 19 times [2020-09-11 16:12:04,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:04,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746570033] [2020-09-11 16:12:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:04,096 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 16:12:04,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746570033] [2020-09-11 16:12:04,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357613683] [2020-09-11 16:12:04,097 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 16:12:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:04,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:04,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:04,261 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 16:12:04,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:04,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:04,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998337909] [2020-09-11 16:12:04,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:04,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:04,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:04,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:04,263 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-09-11 16:12:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:04,322 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-09-11 16:12:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:12:04,323 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:04,324 INFO L225 Difference]: With dead ends: 138 [2020-09-11 16:12:04,324 INFO L226 Difference]: Without dead ends: 136 [2020-09-11 16:12:04,325 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 16:12:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-11 16:12:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-09-11 16:12:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-11 16:12:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-09-11 16:12:04,328 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-09-11 16:12:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:04,328 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-09-11 16:12:04,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-09-11 16:12:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:04,329 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:04,329 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:04,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-11 16:12:04,530 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:04,531 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 20 times [2020-09-11 16:12:04,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:04,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268578276] [2020-09-11 16:12:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:04,629 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 16:12:04,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268578276] [2020-09-11 16:12:04,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079883805] [2020-09-11 16:12:04,630 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 16:12:04,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:04,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:04,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:04,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:04,813 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 16:12:04,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:04,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:04,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434968003] [2020-09-11 16:12:04,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:04,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:04,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:04,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:04,815 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-09-11 16:12:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:04,910 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-11 16:12:04,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:12:04,911 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:04,912 INFO L225 Difference]: With dead ends: 145 [2020-09-11 16:12:04,912 INFO L226 Difference]: Without dead ends: 143 [2020-09-11 16:12:04,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:12:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-11 16:12:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-11 16:12:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-11 16:12:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-09-11 16:12:04,915 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-09-11 16:12:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:04,916 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-09-11 16:12:04,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:04,916 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-09-11 16:12:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:04,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:04,916 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:05,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 16:12:05,117 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:05,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:05,118 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 21 times [2020-09-11 16:12:05,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:05,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81008257] [2020-09-11 16:12:05,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:05,212 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 16:12:05,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81008257] [2020-09-11 16:12:05,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189666492] [2020-09-11 16:12:05,213 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 16:12:05,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:12:05,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:05,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:05,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:05,374 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 16:12:05,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:05,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:05,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724740369] [2020-09-11 16:12:05,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:05,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:05,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:05,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:05,379 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-09-11 16:12:05,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:05,515 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-11 16:12:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:12:05,516 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:05,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:05,517 INFO L225 Difference]: With dead ends: 150 [2020-09-11 16:12:05,517 INFO L226 Difference]: Without dead ends: 148 [2020-09-11 16:12:05,517 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 16:12:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-11 16:12:05,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-09-11 16:12:05,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-11 16:12:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-09-11 16:12:05,522 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-09-11 16:12:05,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:05,522 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-09-11 16:12:05,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:05,522 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-09-11 16:12:05,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:05,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:05,523 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:05,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 16:12:05,733 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:05,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:05,734 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 22 times [2020-09-11 16:12:05,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:05,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864172015] [2020-09-11 16:12:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:05,836 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 16:12:05,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864172015] [2020-09-11 16:12:05,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144878376] [2020-09-11 16:12:05,837 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 16:12:05,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:05,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:05,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:05,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:06,006 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 16:12:06,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:06,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:06,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633398852] [2020-09-11 16:12:06,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:06,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:06,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:06,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:06,008 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-09-11 16:12:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:06,229 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-11 16:12:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:06,230 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:06,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:06,231 INFO L225 Difference]: With dead ends: 150 [2020-09-11 16:12:06,232 INFO L226 Difference]: Without dead ends: 148 [2020-09-11 16:12:06,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:12:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-11 16:12:06,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2020-09-11 16:12:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 16:12:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-11 16:12:06,235 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-11 16:12:06,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:06,235 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-11 16:12:06,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-11 16:12:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:06,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:06,236 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:06,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-11 16:12:06,444 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:06,445 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 23 times [2020-09-11 16:12:06,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:06,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214413808] [2020-09-11 16:12:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:06,529 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 16:12:06,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214413808] [2020-09-11 16:12:06,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901219117] [2020-09-11 16:12:06,530 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 16:12:06,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:06,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:06,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:06,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:06,695 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 16:12:06,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:06,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:06,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462695036] [2020-09-11 16:12:06,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:06,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:06,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:06,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:06,697 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-11 16:12:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:06,870 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-09-11 16:12:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:06,871 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:06,872 INFO L225 Difference]: With dead ends: 147 [2020-09-11 16:12:06,872 INFO L226 Difference]: Without dead ends: 145 [2020-09-11 16:12:06,873 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 16:12:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-11 16:12:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2020-09-11 16:12:06,875 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 16:12:06,876 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-09-11 16:12:06,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:06,876 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 16:12:06,877 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 16:12:07,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950451730] [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 16:12:07,202 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 16:12:07,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950451730] [2020-09-11 16:12:07,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653465435] [2020-09-11 16:12:07,203 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 16:12:07,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:07,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:07,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:07,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:07,382 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 16:12:07,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:07,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:07,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934798360] [2020-09-11 16:12:07,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:07,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:07,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:07,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:07,384 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-09-11 16:12:07,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:07,464 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-09-11 16:12:07,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:12:07,464 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:07,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:07,466 INFO L225 Difference]: With dead ends: 152 [2020-09-11 16:12:07,466 INFO L226 Difference]: Without dead ends: 150 [2020-09-11 16:12:07,466 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 16:12:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-11 16:12:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-09-11 16:12:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 16:12:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-09-11 16:12:07,469 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-09-11 16:12:07,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:07,470 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-09-11 16:12:07,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-09-11 16:12:07,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:07,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:07,470 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:07,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-09-11 16:12:07,678 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:07,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:07,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 25 times [2020-09-11 16:12:07,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:07,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16890922] [2020-09-11 16:12:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:07,796 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 16:12:07,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16890922] [2020-09-11 16:12:07,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001753916] [2020-09-11 16:12:07,797 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 16:12:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:07,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:07,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:07,984 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 16:12:07,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:07,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:07,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324165558] [2020-09-11 16:12:07,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:07,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:07,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:07,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:07,987 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-09-11 16:12:08,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:08,083 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-09-11 16:12:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:12:08,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:08,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:08,086 INFO L225 Difference]: With dead ends: 153 [2020-09-11 16:12:08,086 INFO L226 Difference]: Without dead ends: 151 [2020-09-11 16:12:08,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:08,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-11 16:12:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-09-11 16:12:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 16:12:08,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-11 16:12:08,089 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-11 16:12:08,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:08,090 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-11 16:12:08,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-11 16:12:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:08,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:08,091 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:08,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 16:12:08,292 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:08,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:08,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 26 times [2020-09-11 16:12:08,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:08,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285672686] [2020-09-11 16:12:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:08,392 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 16:12:08,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285672686] [2020-09-11 16:12:08,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137427978] [2020-09-11 16:12:08,392 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 16:12:08,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:08,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:08,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:08,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:08,542 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 16:12:08,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:08,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:08,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649628814] [2020-09-11 16:12:08,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:08,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:08,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:08,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:08,544 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-11 16:12:08,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:08,699 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-11 16:12:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:08,699 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:08,701 INFO L225 Difference]: With dead ends: 156 [2020-09-11 16:12:08,701 INFO L226 Difference]: Without dead ends: 154 [2020-09-11 16:12:08,701 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 16:12:08,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-11 16:12:08,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-09-11 16:12:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-11 16:12:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-09-11 16:12:08,705 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-09-11 16:12:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:08,705 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-09-11 16:12:08,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-09-11 16:12:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:08,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:08,706 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:08,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:08,915 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:08,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:08,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 27 times [2020-09-11 16:12:08,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:08,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751428628] [2020-09-11 16:12:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:09,013 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 16:12:09,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751428628] [2020-09-11 16:12:09,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015776906] [2020-09-11 16:12:09,013 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 16:12:09,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:12:09,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:09,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:09,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:09,186 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 16:12:09,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:09,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:09,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333112604] [2020-09-11 16:12:09,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:09,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:09,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:09,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:09,189 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-09-11 16:12:09,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:09,283 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-11 16:12:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:12:09,284 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:09,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:09,285 INFO L225 Difference]: With dead ends: 148 [2020-09-11 16:12:09,285 INFO L226 Difference]: Without dead ends: 146 [2020-09-11 16:12:09,286 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 16:12:09,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-11 16:12:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-09-11 16:12:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 16:12:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-11 16:12:09,290 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-11 16:12:09,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:09,290 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-11 16:12:09,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:09,290 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-11 16:12:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:09,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:09,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:09,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-11 16:12:09,501 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:09,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 28 times [2020-09-11 16:12:09,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:09,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288774715] [2020-09-11 16:12:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:09,599 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 16:12:09,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288774715] [2020-09-11 16:12:09,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380194147] [2020-09-11 16:12:09,600 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 16:12:09,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:09,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:09,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:09,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:09,764 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 16:12:09,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:09,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:09,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308225282] [2020-09-11 16:12:09,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:09,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:09,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:09,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:09,766 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-11 16:12:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:09,896 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2020-09-11 16:12:09,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:09,896 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:09,898 INFO L225 Difference]: With dead ends: 149 [2020-09-11 16:12:09,898 INFO L226 Difference]: Without dead ends: 147 [2020-09-11 16:12:09,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:12:09,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-11 16:12:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2020-09-11 16:12:09,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 16:12:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-09-11 16:12:09,902 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-09-11 16:12:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:09,903 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-09-11 16:12:09,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-09-11 16:12:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:09,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:09,914 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:10,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:10,126 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:10,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:10,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 29 times [2020-09-11 16:12:10,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:10,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922890417] [2020-09-11 16:12:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:10,214 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 16:12:10,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922890417] [2020-09-11 16:12:10,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183728740] [2020-09-11 16:12:10,215 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 16:12:10,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:10,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:10,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:10,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:10,379 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 16:12:10,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:10,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:10,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851762358] [2020-09-11 16:12:10,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:10,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:10,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:10,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:10,381 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-09-11 16:12:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:10,510 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-11 16:12:10,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:10,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:10,512 INFO L225 Difference]: With dead ends: 149 [2020-09-11 16:12:10,512 INFO L226 Difference]: Without dead ends: 147 [2020-09-11 16:12:10,513 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 16:12:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-11 16:12:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-09-11 16:12:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 16:12:10,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 16:12:10,516 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 16:12:10,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:10,516 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 16:12:10,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:10,517 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 16:12:10,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:10,517 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:10,517 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:10,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-11 16:12:10,719 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 30 times [2020-09-11 16:12:10,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:10,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069800874] [2020-09-11 16:12:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:10,809 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 16:12:10,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069800874] [2020-09-11 16:12:10,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739490592] [2020-09-11 16:12:10,809 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 16:12:10,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:10,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:10,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:12:10,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:10,902 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 16:12:10,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:10,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:12:10,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611180907] [2020-09-11 16:12:10,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:12:10,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:10,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:12:10,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:12:10,904 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 9 states. [2020-09-11 16:12:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:11,079 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-09-11 16:12:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:11,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 16:12:11,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:11,081 INFO L225 Difference]: With dead ends: 164 [2020-09-11 16:12:11,081 INFO L226 Difference]: Without dead ends: 159 [2020-09-11 16:12:11,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:12:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-11 16:12:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-11 16:12:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 16:12:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-09-11 16:12:11,085 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-09-11 16:12:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:11,085 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-09-11 16:12:11,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:12:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-09-11 16:12:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:11,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:11,086 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:11,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 16:12:11,287 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:11,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:11,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 31 times [2020-09-11 16:12:11,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:11,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909678560] [2020-09-11 16:12:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:11,360 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 16:12:11,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909678560] [2020-09-11 16:12:11,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110706341] [2020-09-11 16:12:11,361 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 16:12:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:11,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:11,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:11,527 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 16:12:11,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:11,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:11,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46163613] [2020-09-11 16:12:11,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:11,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:11,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:11,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:11,529 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-09-11 16:12:11,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:11,772 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-11 16:12:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:11,773 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:11,774 INFO L225 Difference]: With dead ends: 156 [2020-09-11 16:12:11,775 INFO L226 Difference]: Without dead ends: 154 [2020-09-11 16:12:11,775 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 16:12:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-11 16:12:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-09-11 16:12:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 16:12:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 16:12:11,779 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 16:12:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:11,779 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 16:12:11,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 16:12:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:11,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:11,780 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:11,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-11 16:12:11,990 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:11,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 32 times [2020-09-11 16:12:11,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:11,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839297187] [2020-09-11 16:12:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:12,072 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 16:12:12,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839297187] [2020-09-11 16:12:12,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653047936] [2020-09-11 16:12:12,073 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 16:12:12,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:12,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:12,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:12,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:12,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:12,257 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 16:12:12,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:12,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:12,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349185434] [2020-09-11 16:12:12,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:12,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:12,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:12,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:12,259 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 16:12:12,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:12,694 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-09-11 16:12:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:12:12,694 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:12,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:12,696 INFO L225 Difference]: With dead ends: 176 [2020-09-11 16:12:12,697 INFO L226 Difference]: Without dead ends: 171 [2020-09-11 16:12:12,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:12:12,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-11 16:12:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-11 16:12:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 16:12:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 16:12:12,701 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 16:12:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:12,701 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 16:12:12,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 16:12:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:12,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:12,702 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:12,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-11 16:12:12,914 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:12,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:12,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 33 times [2020-09-11 16:12:12,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:12,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368735293] [2020-09-11 16:12:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:12,987 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 16:12:12,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368735293] [2020-09-11 16:12:12,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394139423] [2020-09-11 16:12:12,987 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 16:12:13,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:12:13,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:13,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:13,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:13,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:13,202 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 16:12:13,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:13,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:13,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161751341] [2020-09-11 16:12:13,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:13,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:13,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:13,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:13,205 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 16:12:13,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:13,580 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-09-11 16:12:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:13,580 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:13,582 INFO L225 Difference]: With dead ends: 166 [2020-09-11 16:12:13,582 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 16:12:13,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:12:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 16:12:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-09-11 16:12:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 16:12:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-09-11 16:12:13,588 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-09-11 16:12:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:13,588 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-09-11 16:12:13,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-09-11 16:12:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:13,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:13,589 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:13,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:13,802 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:13,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:13,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 34 times [2020-09-11 16:12:13,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:13,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117432308] [2020-09-11 16:12:13,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:13,884 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 16:12:13,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117432308] [2020-09-11 16:12:13,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413491198] [2020-09-11 16:12:13,885 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 16:12:13,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:13,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:13,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:13,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:12:14,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:14,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:14,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383390432] [2020-09-11 16:12:14,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:14,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:14,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:14,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:14,034 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-09-11 16:12:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:14,259 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-09-11 16:12:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:14,260 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:14,261 INFO L225 Difference]: With dead ends: 163 [2020-09-11 16:12:14,261 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 16:12:14,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:12:14,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 16:12:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-09-11 16:12:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-11 16:12:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-09-11 16:12:14,265 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-09-11 16:12:14,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:14,265 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-09-11 16:12:14,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-09-11 16:12:14,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:14,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:14,266 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:14,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-09-11 16:12:14,476 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:14,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 35 times [2020-09-11 16:12:14,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:14,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809911275] [2020-09-11 16:12:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:14,564 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 16:12:14,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809911275] [2020-09-11 16:12:14,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368452984] [2020-09-11 16:12:14,565 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 16:12:14,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:14,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:14,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:14,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:14,743 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 16:12:14,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:14,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:14,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041231713] [2020-09-11 16:12:14,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:14,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:14,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:14,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:14,745 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-09-11 16:12:15,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:15,086 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-09-11 16:12:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:12:15,087 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:15,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:15,088 INFO L225 Difference]: With dead ends: 170 [2020-09-11 16:12:15,088 INFO L226 Difference]: Without dead ends: 168 [2020-09-11 16:12:15,089 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 16:12:15,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-11 16:12:15,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-09-11 16:12:15,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-11 16:12:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-09-11 16:12:15,093 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-09-11 16:12:15,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:15,093 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-09-11 16:12:15,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-09-11 16:12:15,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:15,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:15,094 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:15,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:15,295 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:15,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 36 times [2020-09-11 16:12:15,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:15,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443563132] [2020-09-11 16:12:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:15,371 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 16:12:15,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443563132] [2020-09-11 16:12:15,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272254863] [2020-09-11 16:12:15,372 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 16:12:15,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:15,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:15,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:15,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:15,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:15,538 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 16:12:15,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:15,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:15,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914454328] [2020-09-11 16:12:15,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:15,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:15,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:15,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:15,541 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-09-11 16:12:15,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:15,935 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-11 16:12:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:12:15,936 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:15,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:15,937 INFO L225 Difference]: With dead ends: 177 [2020-09-11 16:12:15,937 INFO L226 Difference]: Without dead ends: 172 [2020-09-11 16:12:15,937 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 16:12:15,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-11 16:12:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-09-11 16:12:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-11 16:12:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-09-11 16:12:15,941 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-09-11 16:12:15,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:15,941 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-09-11 16:12:15,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:15,941 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-09-11 16:12:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:15,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:15,942 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:16,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-09-11 16:12:16,151 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:16,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 37 times [2020-09-11 16:12:16,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:16,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595392250] [2020-09-11 16:12:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:16,232 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 16:12:16,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595392250] [2020-09-11 16:12:16,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203304570] [2020-09-11 16:12:16,232 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 16:12:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:16,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:16,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:16,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:16,361 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 16:12:16,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:16,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:16,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817961788] [2020-09-11 16:12:16,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:16,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:16,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:16,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:16,365 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-09-11 16:12:16,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:16,845 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-09-11 16:12:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:12:16,846 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:16,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:16,847 INFO L225 Difference]: With dead ends: 190 [2020-09-11 16:12:16,848 INFO L226 Difference]: Without dead ends: 182 [2020-09-11 16:12:16,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:12:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-11 16:12:16,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-09-11 16:12:16,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 16:12:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-09-11 16:12:16,851 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-09-11 16:12:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:16,852 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-09-11 16:12:16,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:16,852 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-09-11 16:12:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:16,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:16,852 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:17,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 16:12:17,061 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:17,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:17,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 38 times [2020-09-11 16:12:17,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:17,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226654227] [2020-09-11 16:12:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:17,136 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 16:12:17,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226654227] [2020-09-11 16:12:17,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057839474] [2020-09-11 16:12:17,137 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 16:12:17,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:17,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:17,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:17,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:17,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:17,306 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 16:12:17,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:17,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:17,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184311911] [2020-09-11 16:12:17,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:17,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:17,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:17,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:17,308 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-09-11 16:12:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:17,725 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-09-11 16:12:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:12:17,726 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:17,728 INFO L225 Difference]: With dead ends: 180 [2020-09-11 16:12:17,728 INFO L226 Difference]: Without dead ends: 175 [2020-09-11 16:12:17,728 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 16:12:17,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-11 16:12:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-11 16:12:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 16:12:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-09-11 16:12:17,733 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-09-11 16:12:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:17,733 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-09-11 16:12:17,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-09-11 16:12:17,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:17,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:17,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:17,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:17,937 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:17,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:17,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 39 times [2020-09-11 16:12:17,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:17,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359016629] [2020-09-11 16:12:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:18,013 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 16:12:18,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359016629] [2020-09-11 16:12:18,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143572267] [2020-09-11 16:12:18,013 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 16:12:18,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:12:18,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:18,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:18,190 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 16:12:18,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:18,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:18,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632106199] [2020-09-11 16:12:18,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:18,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:18,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:18,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:18,192 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-09-11 16:12:18,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:18,443 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-09-11 16:12:18,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:18,443 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:18,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:18,445 INFO L225 Difference]: With dead ends: 164 [2020-09-11 16:12:18,445 INFO L226 Difference]: Without dead ends: 162 [2020-09-11 16:12:18,446 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 16:12:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-11 16:12:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-09-11 16:12:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 16:12:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-09-11 16:12:18,450 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-09-11 16:12:18,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:18,451 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-09-11 16:12:18,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:18,451 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-09-11 16:12:18,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:18,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:18,452 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:18,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-11 16:12:18,663 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:18,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:18,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 40 times [2020-09-11 16:12:18,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:18,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474493950] [2020-09-11 16:12:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:18,740 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 16:12:18,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474493950] [2020-09-11 16:12:18,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512724222] [2020-09-11 16:12:18,740 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 16:12:18,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:18,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:18,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:18,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:18,879 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 16:12:18,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:18,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:18,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492448128] [2020-09-11 16:12:18,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:18,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:18,881 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-09-11 16:12:19,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:19,106 INFO L93 Difference]: Finished difference Result 159 states and 368 transitions. [2020-09-11 16:12:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:19,109 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:19,111 INFO L225 Difference]: With dead ends: 159 [2020-09-11 16:12:19,111 INFO L226 Difference]: Without dead ends: 157 [2020-09-11 16:12:19,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:12:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-11 16:12:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2020-09-11 16:12:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 16:12:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-09-11 16:12:19,114 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-09-11 16:12:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:19,115 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-09-11 16:12:19,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-09-11 16:12:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:19,115 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:19,115 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:19,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-11 16:12:19,321 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:19,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 41 times [2020-09-11 16:12:19,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:19,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387856543] [2020-09-11 16:12:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:19,394 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 16:12:19,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387856543] [2020-09-11 16:12:19,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270711954] [2020-09-11 16:12:19,395 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 16:12:19,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:12:19,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:19,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:19,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:19,592 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 16:12:19,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:19,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:19,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970741418] [2020-09-11 16:12:19,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:19,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:19,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:19,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:19,594 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-09-11 16:12:19,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:19,963 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2020-09-11 16:12:19,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:12:19,964 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:19,966 INFO L225 Difference]: With dead ends: 175 [2020-09-11 16:12:19,966 INFO L226 Difference]: Without dead ends: 173 [2020-09-11 16:12:19,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:12:19,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-11 16:12:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2020-09-11 16:12:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 16:12:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-09-11 16:12:19,969 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-09-11 16:12:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:19,969 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-09-11 16:12:19,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:19,969 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-09-11 16:12:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:19,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:19,970 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:20,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-11 16:12:20,171 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:20,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:20,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 42 times [2020-09-11 16:12:20,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:20,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269206350] [2020-09-11 16:12:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:20,250 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 16:12:20,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269206350] [2020-09-11 16:12:20,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153419733] [2020-09-11 16:12:20,251 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 16:12:20,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:20,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:20,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:20,406 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 16:12:20,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:20,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:20,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214685729] [2020-09-11 16:12:20,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:20,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:20,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:20,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:20,407 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-09-11 16:12:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:20,774 INFO L93 Difference]: Finished difference Result 162 states and 374 transitions. [2020-09-11 16:12:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:12:20,775 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:20,776 INFO L225 Difference]: With dead ends: 162 [2020-09-11 16:12:20,776 INFO L226 Difference]: Without dead ends: 160 [2020-09-11 16:12:20,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:12:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-11 16:12:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 118. [2020-09-11 16:12:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 16:12:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-11 16:12:20,780 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-11 16:12:20,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:20,780 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-11 16:12:20,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:20,780 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-11 16:12:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:20,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:20,781 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:20,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:20,987 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:20,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:20,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 43 times [2020-09-11 16:12:20,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:20,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653686561] [2020-09-11 16:12:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:21,067 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 16:12:21,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653686561] [2020-09-11 16:12:21,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825744697] [2020-09-11 16:12:21,068 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 16:12:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:21,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:21,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:21,226 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 16:12:21,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:21,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:21,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257515347] [2020-09-11 16:12:21,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:21,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:21,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:21,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:21,227 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-11 16:12:21,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:21,709 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-09-11 16:12:21,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:12:21,709 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:21,711 INFO L225 Difference]: With dead ends: 171 [2020-09-11 16:12:21,711 INFO L226 Difference]: Without dead ends: 169 [2020-09-11 16:12:21,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:12:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-11 16:12:21,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 120. [2020-09-11 16:12:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 16:12:21,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-11 16:12:21,715 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-11 16:12:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:21,715 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-11 16:12:21,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-11 16:12:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:21,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:21,716 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:21,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:21,922 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:21,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 44 times [2020-09-11 16:12:21,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:21,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686580842] [2020-09-11 16:12:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:22,004 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 16:12:22,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686580842] [2020-09-11 16:12:22,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021368965] [2020-09-11 16:12:22,005 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 16:12:22,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:22,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:22,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:22,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:22,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:22,158 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 16:12:22,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:22,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:22,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752549584] [2020-09-11 16:12:22,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:22,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:22,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:22,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:22,160 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-11 16:12:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:22,595 INFO L93 Difference]: Finished difference Result 165 states and 396 transitions. [2020-09-11 16:12:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:12:22,596 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:22,597 INFO L225 Difference]: With dead ends: 165 [2020-09-11 16:12:22,598 INFO L226 Difference]: Without dead ends: 160 [2020-09-11 16:12:22,598 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 16:12:22,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-11 16:12:22,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 121. [2020-09-11 16:12:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 16:12:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-11 16:12:22,601 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-11 16:12:22,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:22,602 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-11 16:12:22,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-11 16:12:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:22,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:22,602 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:22,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:22,804 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:22,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 45 times [2020-09-11 16:12:22,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:22,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844906279] [2020-09-11 16:12:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:22,878 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 16:12:22,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844906279] [2020-09-11 16:12:22,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436339231] [2020-09-11 16:12:22,879 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 16:12:22,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:12:22,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:22,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:22,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:23,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:23,058 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 16:12:23,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:23,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:23,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650660134] [2020-09-11 16:12:23,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:23,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:23,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:23,060 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-11 16:12:23,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:23,710 INFO L93 Difference]: Finished difference Result 194 states and 461 transitions. [2020-09-11 16:12:23,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:12:23,711 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:23,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:23,712 INFO L225 Difference]: With dead ends: 194 [2020-09-11 16:12:23,712 INFO L226 Difference]: Without dead ends: 186 [2020-09-11 16:12:23,712 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 16:12:23,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-11 16:12:23,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 118. [2020-09-11 16:12:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 16:12:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-11 16:12:23,716 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-11 16:12:23,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:23,716 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-11 16:12:23,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:23,716 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-11 16:12:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:23,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:23,717 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:23,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:23,925 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:23,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:23,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 46 times [2020-09-11 16:12:23,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:23,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708758361] [2020-09-11 16:12:23,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:24,002 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 16:12:24,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708758361] [2020-09-11 16:12:24,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433672929] [2020-09-11 16:12:24,003 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 16:12:24,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:24,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:24,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:24,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:24,158 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 16:12:24,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:24,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:24,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19560230] [2020-09-11 16:12:24,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:24,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:24,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:24,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:24,160 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-11 16:12:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:24,600 INFO L93 Difference]: Finished difference Result 168 states and 393 transitions. [2020-09-11 16:12:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:12:24,601 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:24,602 INFO L225 Difference]: With dead ends: 168 [2020-09-11 16:12:24,603 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 16:12:24,603 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 16:12:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 16:12:24,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-09-11 16:12:24,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 16:12:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-11 16:12:24,606 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-11 16:12:24,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:24,606 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-11 16:12:24,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:24,607 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-11 16:12:24,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:24,607 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:24,607 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:24,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-11 16:12:24,809 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:24,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 47 times [2020-09-11 16:12:24,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:24,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321029080] [2020-09-11 16:12:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:24,893 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 16:12:24,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321029080] [2020-09-11 16:12:24,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216510724] [2020-09-11 16:12:24,895 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 16:12:24,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:24,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:24,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:25,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:25,038 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 16:12:25,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:25,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:25,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095376425] [2020-09-11 16:12:25,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:25,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:25,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:25,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:25,040 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-11 16:12:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:25,603 INFO L93 Difference]: Finished difference Result 181 states and 430 transitions. [2020-09-11 16:12:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:12:25,604 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:25,605 INFO L225 Difference]: With dead ends: 181 [2020-09-11 16:12:25,606 INFO L226 Difference]: Without dead ends: 173 [2020-09-11 16:12:25,606 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 16:12:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-11 16:12:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 119. [2020-09-11 16:12:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-11 16:12:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-09-11 16:12:25,609 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-09-11 16:12:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:25,609 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-09-11 16:12:25,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:25,609 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-09-11 16:12:25,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:25,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:25,610 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:25,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:25,811 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:25,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:25,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 48 times [2020-09-11 16:12:25,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:25,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301547194] [2020-09-11 16:12:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:25,895 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 16:12:25,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301547194] [2020-09-11 16:12:25,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872292762] [2020-09-11 16:12:25,896 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 16:12:25,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:25,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:25,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:12:25,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:26,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:26,012 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 16:12:26,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:26,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 16:12:26,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010731075] [2020-09-11 16:12:26,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:12:26,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:26,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:12:26,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:12:26,014 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-09-11 16:12:26,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:26,585 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-09-11 16:12:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:12:26,585 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 16:12:26,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:26,587 INFO L225 Difference]: With dead ends: 171 [2020-09-11 16:12:26,587 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 16:12:26,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:12:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 16:12:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2020-09-11 16:12:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-11 16:12:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-09-11 16:12:26,591 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-09-11 16:12:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:26,591 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-09-11 16:12:26,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:12:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-09-11 16:12:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:26,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:26,592 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:26,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-11 16:12:26,795 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:26,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:26,795 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-09-11 16:12:26,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:26,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292861287] [2020-09-11 16:12:26,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:26,887 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 16:12:26,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292861287] [2020-09-11 16:12:26,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241076886] [2020-09-11 16:12:26,888 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 16:12:26,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:12:26,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:26,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:26,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:27,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:27,086 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 16:12:27,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:27,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-11 16:12:27,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931514656] [2020-09-11 16:12:27,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:12:27,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:27,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:12:27,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:12:27,088 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-09-11 16:12:27,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:27,277 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-09-11 16:12:27,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:27,277 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-09-11 16:12:27,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:27,279 INFO L225 Difference]: With dead ends: 164 [2020-09-11 16:12:27,279 INFO L226 Difference]: Without dead ends: 159 [2020-09-11 16:12:27,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:12:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-11 16:12:27,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-11 16:12:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 16:12:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-09-11 16:12:27,282 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-09-11 16:12:27,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:27,282 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-09-11 16:12:27,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:12:27,283 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-09-11 16:12:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:27,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:27,283 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:27,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:27,485 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:27,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-09-11 16:12:27,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:27,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659852912] [2020-09-11 16:12:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:27,572 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 16:12:27,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659852912] [2020-09-11 16:12:27,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232234295] [2020-09-11 16:12:27,572 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 16:12:27,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:12:27,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:27,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:27,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:27,747 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 16:12:27,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:27,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:27,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943999617] [2020-09-11 16:12:27,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:27,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:27,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:27,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:27,749 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-09-11 16:12:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:27,913 INFO L93 Difference]: Finished difference Result 158 states and 371 transitions. [2020-09-11 16:12:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:27,914 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 16:12:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:27,915 INFO L225 Difference]: With dead ends: 158 [2020-09-11 16:12:27,915 INFO L226 Difference]: Without dead ends: 155 [2020-09-11 16:12:27,916 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 16:12:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-11 16:12:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2020-09-11 16:12:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-11 16:12:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-11 16:12:27,919 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-11 16:12:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:27,919 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-11 16:12:27,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-11 16:12:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:27,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:27,920 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:28,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-11 16:12:28,129 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-09-11 16:12:28,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:28,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454166290] [2020-09-11 16:12:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:28,240 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 16:12:28,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454166290] [2020-09-11 16:12:28,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801559862] [2020-09-11 16:12:28,241 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 16:12:28,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:28,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:28,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:28,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:28,456 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 16:12:28,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:28,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:28,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070525964] [2020-09-11 16:12:28,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:28,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:28,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:28,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:28,458 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-11 16:12:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:28,728 INFO L93 Difference]: Finished difference Result 172 states and 398 transitions. [2020-09-11 16:12:28,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:28,729 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 16:12:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:28,730 INFO L225 Difference]: With dead ends: 172 [2020-09-11 16:12:28,730 INFO L226 Difference]: Without dead ends: 169 [2020-09-11 16:12:28,730 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 16:12:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-11 16:12:28,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 129. [2020-09-11 16:12:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-11 16:12:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-11 16:12:28,733 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-11 16:12:28,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:28,734 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-11 16:12:28,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-11 16:12:28,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:28,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:28,735 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:28,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:28,937 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:28,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-09-11 16:12:28,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:28,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946895629] [2020-09-11 16:12:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:29,038 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 16:12:29,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946895629] [2020-09-11 16:12:29,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245401272] [2020-09-11 16:12:29,039 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 16:12:29,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:12:29,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:29,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:29,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:29,242 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 16:12:29,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:29,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:29,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700679603] [2020-09-11 16:12:29,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:29,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:29,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:29,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:29,244 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-11 16:12:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:29,539 INFO L93 Difference]: Finished difference Result 177 states and 410 transitions. [2020-09-11 16:12:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:12:29,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 16:12:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:29,542 INFO L225 Difference]: With dead ends: 177 [2020-09-11 16:12:29,542 INFO L226 Difference]: Without dead ends: 174 [2020-09-11 16:12:29,542 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 16:12:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-11 16:12:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 130. [2020-09-11 16:12:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-11 16:12:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-09-11 16:12:29,546 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-09-11 16:12:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:29,547 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-09-11 16:12:29,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-09-11 16:12:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:29,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:29,547 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:29,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:29,757 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:29,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:29,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-09-11 16:12:29,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:29,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109777263] [2020-09-11 16:12:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:29,843 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 16:12:29,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109777263] [2020-09-11 16:12:29,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948401455] [2020-09-11 16:12:29,843 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 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 16:12:29,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:12:29,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:29,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:29,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:30,026 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 16:12:30,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:30,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:30,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359665614] [2020-09-11 16:12:30,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:30,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:30,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:30,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:30,029 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-09-11 16:12:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:30,415 INFO L93 Difference]: Finished difference Result 176 states and 410 transitions. [2020-09-11 16:12:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:12:30,416 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 16:12:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:30,417 INFO L225 Difference]: With dead ends: 176 [2020-09-11 16:12:30,417 INFO L226 Difference]: Without dead ends: 173 [2020-09-11 16:12:30,417 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 16:12:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-11 16:12:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 132. [2020-09-11 16:12:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-11 16:12:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-09-11 16:12:30,420 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-09-11 16:12:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:30,420 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-09-11 16:12:30,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-09-11 16:12:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:30,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:30,421 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:30,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-09-11 16:12:30,629 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:30,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-09-11 16:12:30,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:30,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243587163] [2020-09-11 16:12:30,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:30,728 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 16:12:30,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243587163] [2020-09-11 16:12:30,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49702721] [2020-09-11 16:12:30,729 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 16:12:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:30,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:30,911 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 16:12:30,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:30,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:30,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626479737] [2020-09-11 16:12:30,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:30,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:30,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:30,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:30,913 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-09-11 16:12:31,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:31,222 INFO L93 Difference]: Finished difference Result 169 states and 398 transitions. [2020-09-11 16:12:31,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:31,223 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 16:12:31,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:31,225 INFO L225 Difference]: With dead ends: 169 [2020-09-11 16:12:31,225 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 16:12:31,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:12:31,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 16:12:31,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 134. [2020-09-11 16:12:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-11 16:12:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-09-11 16:12:31,230 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-09-11 16:12:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:31,230 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-09-11 16:12:31,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-09-11 16:12:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:12:31,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:31,232 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:31,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:31,446 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:31,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:31,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-09-11 16:12:31,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:31,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297996437] [2020-09-11 16:12:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:31,534 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 16:12:31,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297996437] [2020-09-11 16:12:31,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269101520] [2020-09-11 16:12:31,535 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 16:12:31,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:31,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:31,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:31,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:31,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:31,698 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 16:12:31,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:31,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:31,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166171290] [2020-09-11 16:12:31,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:31,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:31,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:31,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:31,699 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-09-11 16:12:32,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:32,088 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-09-11 16:12:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:32,088 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 16:12:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:32,090 INFO L225 Difference]: With dead ends: 176 [2020-09-11 16:12:32,090 INFO L226 Difference]: Without dead ends: 170 [2020-09-11 16:12:32,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:12:32,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-11 16:12:32,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-09-11 16:12:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-11 16:12:32,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-09-11 16:12:32,095 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-09-11 16:12:32,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:32,096 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-09-11 16:12:32,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-09-11 16:12:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:32,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:32,097 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:32,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:32,307 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:32,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:32,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 49 times [2020-09-11 16:12:32,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:32,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093414477] [2020-09-11 16:12:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:32,444 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 16:12:32,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093414477] [2020-09-11 16:12:32,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200995014] [2020-09-11 16:12:32,445 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 16:12:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:32,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:32,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:32,698 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 16:12:32,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:32,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:32,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123400136] [2020-09-11 16:12:32,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:32,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:32,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:32,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:32,701 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-09-11 16:12:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:32,791 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-09-11 16:12:32,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:12:32,792 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:32,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:32,794 INFO L225 Difference]: With dead ends: 163 [2020-09-11 16:12:32,794 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 16:12:32,794 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 16:12:32,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 16:12:32,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-09-11 16:12:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-11 16:12:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-09-11 16:12:32,799 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-09-11 16:12:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:32,800 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-09-11 16:12:32,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-09-11 16:12:32,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:32,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:32,801 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:33,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-11 16:12:33,013 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:33,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:33,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 50 times [2020-09-11 16:12:33,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:33,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161282127] [2020-09-11 16:12:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:33,176 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 16:12:33,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161282127] [2020-09-11 16:12:33,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27046720] [2020-09-11 16:12:33,177 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 16:12:33,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:33,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:33,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:33,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:33,358 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 16:12:33,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:33,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:33,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154612602] [2020-09-11 16:12:33,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:33,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:33,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:33,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:33,360 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-09-11 16:12:33,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:33,448 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-09-11 16:12:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:12:33,449 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:33,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:33,451 INFO L225 Difference]: With dead ends: 172 [2020-09-11 16:12:33,451 INFO L226 Difference]: Without dead ends: 170 [2020-09-11 16:12:33,451 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 16:12:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-11 16:12:33,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-09-11 16:12:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 16:12:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-11 16:12:33,454 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-11 16:12:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:33,454 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-11 16:12:33,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-11 16:12:33,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:33,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:33,454 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:33,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:33,656 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:33,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:33,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 51 times [2020-09-11 16:12:33,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:33,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865625343] [2020-09-11 16:12:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:33,753 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 16:12:33,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865625343] [2020-09-11 16:12:33,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160448718] [2020-09-11 16:12:33,753 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 16:12:33,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:12:33,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:33,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:33,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:34,010 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 16:12:34,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:34,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:34,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321307185] [2020-09-11 16:12:34,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:34,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:34,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:34,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:34,012 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-11 16:12:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:34,185 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-11 16:12:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:34,186 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:34,187 INFO L225 Difference]: With dead ends: 179 [2020-09-11 16:12:34,188 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 16:12:34,188 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 16:12:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 16:12:34,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-09-11 16:12:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-11 16:12:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-09-11 16:12:34,191 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-09-11 16:12:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:34,192 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-09-11 16:12:34,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-09-11 16:12:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:34,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:34,193 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:34,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-11 16:12:34,394 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:34,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 52 times [2020-09-11 16:12:34,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:34,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3815403] [2020-09-11 16:12:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:34,499 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 16:12:34,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3815403] [2020-09-11 16:12:34,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413873275] [2020-09-11 16:12:34,500 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 16:12:34,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:34,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:34,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:34,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:34,685 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 16:12:34,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:34,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:34,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718670450] [2020-09-11 16:12:34,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:34,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:34,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:34,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:34,687 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-09-11 16:12:34,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:34,900 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-11 16:12:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:34,901 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:34,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:34,902 INFO L225 Difference]: With dead ends: 179 [2020-09-11 16:12:34,903 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 16:12:34,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:12:34,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 16:12:34,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-09-11 16:12:34,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 16:12:34,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-11 16:12:34,908 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-11 16:12:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:34,908 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-11 16:12:34,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-11 16:12:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:34,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:34,909 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:35,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-09-11 16:12:35,120 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:35,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 53 times [2020-09-11 16:12:35,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:35,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860925390] [2020-09-11 16:12:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:35,217 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 16:12:35,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860925390] [2020-09-11 16:12:35,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786635893] [2020-09-11 16:12:35,218 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 16:12:35,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:35,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:35,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:35,397 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 16:12:35,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:35,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:35,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944517513] [2020-09-11 16:12:35,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:35,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:35,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:35,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:35,399 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-11 16:12:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:35,594 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-09-11 16:12:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:35,595 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:35,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:35,596 INFO L225 Difference]: With dead ends: 184 [2020-09-11 16:12:35,597 INFO L226 Difference]: Without dead ends: 182 [2020-09-11 16:12:35,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:12:35,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-11 16:12:35,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-09-11 16:12:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 16:12:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-09-11 16:12:35,600 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-09-11 16:12:35,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:35,600 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-09-11 16:12:35,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-09-11 16:12:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:35,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:35,600 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:35,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-11 16:12:35,801 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:35,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:35,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 54 times [2020-09-11 16:12:35,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:35,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082021244] [2020-09-11 16:12:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:35,897 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 16:12:35,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082021244] [2020-09-11 16:12:35,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510779258] [2020-09-11 16:12:35,897 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 16:12:35,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:12:35,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:35,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:36,097 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 16:12:36,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:36,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:36,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062037814] [2020-09-11 16:12:36,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:36,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:36,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:36,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:36,099 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-09-11 16:12:36,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:36,352 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-09-11 16:12:36,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:36,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:36,355 INFO L225 Difference]: With dead ends: 179 [2020-09-11 16:12:36,355 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 16:12:36,355 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 16:12:36,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 16:12:36,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-09-11 16:12:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-11 16:12:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-09-11 16:12:36,360 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-09-11 16:12:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:36,361 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-09-11 16:12:36,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-09-11 16:12:36,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:36,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:36,362 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:36,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:36,563 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:36,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:36,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 55 times [2020-09-11 16:12:36,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:36,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990292052] [2020-09-11 16:12:36,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:36,652 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 16:12:36,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990292052] [2020-09-11 16:12:36,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495433586] [2020-09-11 16:12:36,653 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 16:12:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:36,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:36,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:36,829 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 16:12:36,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:36,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:36,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896188782] [2020-09-11 16:12:36,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:36,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:36,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:36,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:36,831 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-09-11 16:12:37,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:37,126 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-11 16:12:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:37,126 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:37,128 INFO L225 Difference]: With dead ends: 177 [2020-09-11 16:12:37,128 INFO L226 Difference]: Without dead ends: 175 [2020-09-11 16:12:37,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:12:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-11 16:12:37,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2020-09-11 16:12:37,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 16:12:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-09-11 16:12:37,131 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-09-11 16:12:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:37,131 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-09-11 16:12:37,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-09-11 16:12:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:37,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:37,132 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:37,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:37,333 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 56 times [2020-09-11 16:12:37,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:37,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577055762] [2020-09-11 16:12:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:37,422 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 16:12:37,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577055762] [2020-09-11 16:12:37,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705374272] [2020-09-11 16:12:37,423 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 16:12:37,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:37,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:37,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:37,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:37,605 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 16:12:37,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:37,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:37,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779819545] [2020-09-11 16:12:37,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:37,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:37,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:37,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:37,607 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-09-11 16:12:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:37,912 INFO L93 Difference]: Finished difference Result 187 states and 443 transitions. [2020-09-11 16:12:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:37,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:37,915 INFO L225 Difference]: With dead ends: 187 [2020-09-11 16:12:37,915 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 16:12:37,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:12:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 16:12:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-09-11 16:12:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 16:12:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-09-11 16:12:37,917 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-09-11 16:12:37,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:37,918 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-09-11 16:12:37,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:37,918 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-09-11 16:12:37,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:37,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:37,918 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:38,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:38,119 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:38,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 57 times [2020-09-11 16:12:38,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:38,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084358271] [2020-09-11 16:12:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:38,220 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 16:12:38,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084358271] [2020-09-11 16:12:38,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233489744] [2020-09-11 16:12:38,221 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 16:12:38,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:12:38,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:38,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:38,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:38,408 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 16:12:38,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:38,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:38,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658883159] [2020-09-11 16:12:38,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:38,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:38,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:38,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:38,410 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-09-11 16:12:38,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:38,677 INFO L93 Difference]: Finished difference Result 181 states and 433 transitions. [2020-09-11 16:12:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:38,677 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:38,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:38,679 INFO L225 Difference]: With dead ends: 181 [2020-09-11 16:12:38,679 INFO L226 Difference]: Without dead ends: 179 [2020-09-11 16:12:38,679 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 16:12:38,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-11 16:12:38,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 138. [2020-09-11 16:12:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-11 16:12:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-09-11 16:12:38,683 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-09-11 16:12:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:38,683 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-09-11 16:12:38,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-09-11 16:12:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:38,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:38,684 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:38,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:38,885 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:38,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:38,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 58 times [2020-09-11 16:12:38,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:38,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611939195] [2020-09-11 16:12:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:39,057 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 16:12:39,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611939195] [2020-09-11 16:12:39,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057762674] [2020-09-11 16:12:39,058 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 16:12:39,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:39,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:39,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:39,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:39,260 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 16:12:39,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:39,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:39,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026778280] [2020-09-11 16:12:39,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:39,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:39,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:39,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:39,262 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-09-11 16:12:39,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:39,354 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-09-11 16:12:39,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:12:39,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:39,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:39,357 INFO L225 Difference]: With dead ends: 182 [2020-09-11 16:12:39,357 INFO L226 Difference]: Without dead ends: 180 [2020-09-11 16:12:39,357 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 16:12:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-11 16:12:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-09-11 16:12:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 16:12:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-09-11 16:12:39,362 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-09-11 16:12:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:39,363 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-09-11 16:12:39,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-09-11 16:12:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:39,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:39,364 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:39,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-09-11 16:12:39,565 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 59 times [2020-09-11 16:12:39,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:39,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714009981] [2020-09-11 16:12:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:39,704 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 16:12:39,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714009981] [2020-09-11 16:12:39,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641162372] [2020-09-11 16:12:39,705 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 16:12:39,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:39,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:39,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:39,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:39,897 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 16:12:39,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:39,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:39,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469950708] [2020-09-11 16:12:39,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:39,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:39,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:39,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:39,900 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-09-11 16:12:40,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:40,009 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-09-11 16:12:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:40,009 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:40,011 INFO L225 Difference]: With dead ends: 185 [2020-09-11 16:12:40,011 INFO L226 Difference]: Without dead ends: 183 [2020-09-11 16:12:40,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:12:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-11 16:12:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-09-11 16:12:40,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:12:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-11 16:12:40,015 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-11 16:12:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:40,015 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-11 16:12:40,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:40,015 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-11 16:12:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:40,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:40,016 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:40,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:40,219 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:40,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:40,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 60 times [2020-09-11 16:12:40,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:40,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765733141] [2020-09-11 16:12:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:40,347 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 16:12:40,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765733141] [2020-09-11 16:12:40,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362264837] [2020-09-11 16:12:40,347 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 16:12:40,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:40,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:40,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:40,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:40,740 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 16:12:40,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:40,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:40,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057673187] [2020-09-11 16:12:40,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:40,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:40,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:40,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:40,742 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-11 16:12:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:40,943 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-09-11 16:12:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:40,944 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:40,945 INFO L225 Difference]: With dead ends: 191 [2020-09-11 16:12:40,945 INFO L226 Difference]: Without dead ends: 189 [2020-09-11 16:12:40,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:12:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-11 16:12:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-09-11 16:12:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 16:12:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-09-11 16:12:40,949 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-09-11 16:12:40,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:40,949 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-09-11 16:12:40,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-09-11 16:12:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:40,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:40,950 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:41,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:41,154 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:41,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 61 times [2020-09-11 16:12:41,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:41,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561713640] [2020-09-11 16:12:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:41,257 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 16:12:41,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561713640] [2020-09-11 16:12:41,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796964587] [2020-09-11 16:12:41,257 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 16:12:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:41,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:41,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:41,454 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 16:12:41,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:41,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:41,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849195127] [2020-09-11 16:12:41,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:41,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:41,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:41,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:41,455 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-09-11 16:12:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:41,679 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-09-11 16:12:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:41,679 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:41,680 INFO L225 Difference]: With dead ends: 187 [2020-09-11 16:12:41,681 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 16:12:41,681 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 16:12:41,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 16:12:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-09-11 16:12:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:12:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-11 16:12:41,684 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-11 16:12:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:41,684 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-11 16:12:41,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-11 16:12:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:41,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:41,685 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:41,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:41,886 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:41,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 62 times [2020-09-11 16:12:41,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:41,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956329310] [2020-09-11 16:12:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:41,999 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 16:12:42,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956329310] [2020-09-11 16:12:42,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449904651] [2020-09-11 16:12:42,000 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 16:12:42,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:42,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:42,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:42,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:42,180 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 16:12:42,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:42,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:42,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016820120] [2020-09-11 16:12:42,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:42,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:42,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:42,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:42,182 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-11 16:12:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:42,427 INFO L93 Difference]: Finished difference Result 194 states and 455 transitions. [2020-09-11 16:12:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:42,427 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:42,429 INFO L225 Difference]: With dead ends: 194 [2020-09-11 16:12:42,429 INFO L226 Difference]: Without dead ends: 192 [2020-09-11 16:12:42,430 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 16:12:42,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-11 16:12:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 142. [2020-09-11 16:12:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:12:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-09-11 16:12:42,434 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-09-11 16:12:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:42,434 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-09-11 16:12:42,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-09-11 16:12:42,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:42,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:42,435 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:42,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:42,635 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:42,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:42,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 63 times [2020-09-11 16:12:42,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:42,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511027794] [2020-09-11 16:12:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:42,758 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 16:12:42,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511027794] [2020-09-11 16:12:42,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881139140] [2020-09-11 16:12:42,759 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 16:12:42,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:12:42,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:42,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:42,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:42,964 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 16:12:42,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:42,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:42,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409195721] [2020-09-11 16:12:42,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:42,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:42,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:42,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:42,966 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-09-11 16:12:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:43,241 INFO L93 Difference]: Finished difference Result 186 states and 443 transitions. [2020-09-11 16:12:43,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:43,245 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:43,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:43,246 INFO L225 Difference]: With dead ends: 186 [2020-09-11 16:12:43,246 INFO L226 Difference]: Without dead ends: 184 [2020-09-11 16:12:43,246 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 16:12:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-11 16:12:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 139. [2020-09-11 16:12:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 16:12:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-09-11 16:12:43,248 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-09-11 16:12:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:43,248 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-09-11 16:12:43,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-09-11 16:12:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:43,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:43,249 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:43,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-11 16:12:43,450 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:43,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:43,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 64 times [2020-09-11 16:12:43,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:43,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868666403] [2020-09-11 16:12:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:43,599 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 16:12:43,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868666403] [2020-09-11 16:12:43,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162160395] [2020-09-11 16:12:43,600 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 16:12:43,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:43,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:43,795 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 16:12:43,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:43,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:43,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492480209] [2020-09-11 16:12:43,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:43,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:43,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:43,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:43,797 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-09-11 16:12:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:43,891 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-09-11 16:12:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:12:43,892 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:43,894 INFO L225 Difference]: With dead ends: 178 [2020-09-11 16:12:43,894 INFO L226 Difference]: Without dead ends: 176 [2020-09-11 16:12:43,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:12:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-11 16:12:43,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-09-11 16:12:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 16:12:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-09-11 16:12:43,897 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-09-11 16:12:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:43,897 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-09-11 16:12:43,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:43,898 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-09-11 16:12:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:43,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:43,898 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:44,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-11 16:12:44,107 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:44,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 65 times [2020-09-11 16:12:44,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:44,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505614197] [2020-09-11 16:12:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:44,233 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 16:12:44,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505614197] [2020-09-11 16:12:44,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388754656] [2020-09-11 16:12:44,234 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 16:12:44,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:44,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:44,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:44,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:44,431 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 16:12:44,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:44,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:44,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321750481] [2020-09-11 16:12:44,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:44,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:44,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:44,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:44,433 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-09-11 16:12:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:44,593 INFO L93 Difference]: Finished difference Result 181 states and 428 transitions. [2020-09-11 16:12:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:44,594 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:44,595 INFO L225 Difference]: With dead ends: 181 [2020-09-11 16:12:44,595 INFO L226 Difference]: Without dead ends: 179 [2020-09-11 16:12:44,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:12:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-11 16:12:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2020-09-11 16:12:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 16:12:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-09-11 16:12:44,598 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-09-11 16:12:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:44,598 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-09-11 16:12:44,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-09-11 16:12:44,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:44,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:44,599 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:44,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:44,803 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:44,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:44,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 66 times [2020-09-11 16:12:44,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:44,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623054292] [2020-09-11 16:12:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:44,919 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 16:12:44,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623054292] [2020-09-11 16:12:44,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904318763] [2020-09-11 16:12:44,919 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 16:12:44,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:12:44,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:44,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:44,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:45,636 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 16:12:45,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:45,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:45,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484636054] [2020-09-11 16:12:45,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:45,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:45,638 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-09-11 16:12:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:45,869 INFO L93 Difference]: Finished difference Result 187 states and 440 transitions. [2020-09-11 16:12:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:45,870 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:45,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:45,871 INFO L225 Difference]: With dead ends: 187 [2020-09-11 16:12:45,871 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 16:12:45,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:12:45,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 16:12:45,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-09-11 16:12:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 16:12:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-09-11 16:12:45,875 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-09-11 16:12:45,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:45,875 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-09-11 16:12:45,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:45,876 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-09-11 16:12:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:45,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:45,876 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:46,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:46,086 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:46,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:46,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 67 times [2020-09-11 16:12:46,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:46,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161047252] [2020-09-11 16:12:46,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:46,221 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 16:12:46,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161047252] [2020-09-11 16:12:46,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606185133] [2020-09-11 16:12:46,222 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 16:12:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:46,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:46,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:46,419 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 16:12:46,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:46,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:46,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322410545] [2020-09-11 16:12:46,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:46,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:46,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:46,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:46,421 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-09-11 16:12:46,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:46,563 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-09-11 16:12:46,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:12:46,564 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:46,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:46,566 INFO L225 Difference]: With dead ends: 174 [2020-09-11 16:12:46,566 INFO L226 Difference]: Without dead ends: 172 [2020-09-11 16:12:46,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:12:46,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-11 16:12:46,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-09-11 16:12:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:12:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-09-11 16:12:46,569 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-09-11 16:12:46,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:46,570 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-09-11 16:12:46,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-09-11 16:12:46,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:46,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:46,570 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:46,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:46,771 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:46,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:46,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 68 times [2020-09-11 16:12:46,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:46,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951625828] [2020-09-11 16:12:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:46,893 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 16:12:46,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951625828] [2020-09-11 16:12:46,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424689562] [2020-09-11 16:12:46,894 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 16:12:46,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:46,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:46,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:46,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:47,090 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 16:12:47,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:47,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:47,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582235071] [2020-09-11 16:12:47,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:47,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:47,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:47,092 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-09-11 16:12:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:47,262 INFO L93 Difference]: Finished difference Result 177 states and 419 transitions. [2020-09-11 16:12:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:47,263 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:47,264 INFO L225 Difference]: With dead ends: 177 [2020-09-11 16:12:47,265 INFO L226 Difference]: Without dead ends: 175 [2020-09-11 16:12:47,265 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 16:12:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-11 16:12:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 141. [2020-09-11 16:12:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 16:12:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-09-11 16:12:47,268 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-09-11 16:12:47,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:47,268 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-09-11 16:12:47,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:47,268 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-09-11 16:12:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:47,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:47,268 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:47,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:47,469 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:47,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:47,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 69 times [2020-09-11 16:12:47,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:47,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062841296] [2020-09-11 16:12:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:47,585 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 16:12:47,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062841296] [2020-09-11 16:12:47,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402830013] [2020-09-11 16:12:47,586 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 16:12:47,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:12:47,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:47,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:47,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:47,781 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 16:12:47,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:47,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:47,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123048462] [2020-09-11 16:12:47,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:47,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:47,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:47,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:47,783 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-09-11 16:12:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:47,964 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-09-11 16:12:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:12:47,965 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:47,966 INFO L225 Difference]: With dead ends: 175 [2020-09-11 16:12:47,966 INFO L226 Difference]: Without dead ends: 173 [2020-09-11 16:12:47,967 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 16:12:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-11 16:12:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-09-11 16:12:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 16:12:47,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 16:12:47,969 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 16:12:47,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:47,970 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 16:12:47,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 16:12:47,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:47,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:47,970 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:48,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:48,171 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:48,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 70 times [2020-09-11 16:12:48,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:48,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627784913] [2020-09-11 16:12:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:48,274 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 16:12:48,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627784913] [2020-09-11 16:12:48,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190646487] [2020-09-11 16:12:48,275 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 16:12:48,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:48,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:48,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:48,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:48,522 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 16:12:48,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:48,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:48,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474538530] [2020-09-11 16:12:48,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:48,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:48,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:48,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:48,524 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 16:12:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:48,954 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-09-11 16:12:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:48,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:48,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:48,957 INFO L225 Difference]: With dead ends: 195 [2020-09-11 16:12:48,957 INFO L226 Difference]: Without dead ends: 190 [2020-09-11 16:12:48,957 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 16:12:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-11 16:12:48,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-09-11 16:12:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 16:12:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-11 16:12:48,960 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-11 16:12:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:48,960 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-11 16:12:48,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-11 16:12:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:48,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:48,961 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:49,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:49,162 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:49,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:49,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 71 times [2020-09-11 16:12:49,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:49,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735933864] [2020-09-11 16:12:49,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:49,263 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 16:12:49,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735933864] [2020-09-11 16:12:49,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730506115] [2020-09-11 16:12:49,264 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 16:12:49,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:49,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:49,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:49,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:49,476 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 16:12:49,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:49,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:49,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930536297] [2020-09-11 16:12:49,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:49,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:49,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:49,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:49,478 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-11 16:12:49,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:49,819 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-09-11 16:12:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:12:49,820 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:49,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:49,821 INFO L225 Difference]: With dead ends: 187 [2020-09-11 16:12:49,821 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 16:12:49,821 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 16:12:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 16:12:49,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-09-11 16:12:49,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 16:12:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 16:12:49,824 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 16:12:49,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:49,824 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 16:12:49,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 16:12:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:49,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:49,825 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:50,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:50,026 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:50,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:50,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 72 times [2020-09-11 16:12:50,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:50,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778560066] [2020-09-11 16:12:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:50,122 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 16:12:50,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778560066] [2020-09-11 16:12:50,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277425267] [2020-09-11 16:12:50,123 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 16:12:50,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:12:50,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:50,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:50,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:50,345 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 16:12:50,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:50,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:50,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588141072] [2020-09-11 16:12:50,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:50,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:50,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:50,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:50,346 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 16:12:50,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:50,923 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-09-11 16:12:50,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:12:50,924 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:50,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:50,925 INFO L225 Difference]: With dead ends: 212 [2020-09-11 16:12:50,925 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 16:12:50,926 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 16:12:50,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 16:12:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-11 16:12:50,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 16:12:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 16:12:50,929 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 16:12:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:50,929 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 16:12:50,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:50,929 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 16:12:50,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:50,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:50,930 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:51,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-11 16:12:51,131 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:51,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 73 times [2020-09-11 16:12:51,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:51,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612436987] [2020-09-11 16:12:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:51,234 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 16:12:51,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612436987] [2020-09-11 16:12:51,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426951102] [2020-09-11 16:12:51,234 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 16:12:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:51,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:51,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:51,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:12:51,431 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 16:12:51,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:51,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:51,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158257093] [2020-09-11 16:12:51,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:51,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:51,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:51,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:51,433 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 16:12:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:51,866 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-11 16:12:51,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:51,867 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:51,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:51,869 INFO L225 Difference]: With dead ends: 202 [2020-09-11 16:12:51,869 INFO L226 Difference]: Without dead ends: 197 [2020-09-11 16:12:51,869 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 16:12:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-11 16:12:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-09-11 16:12:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 16:12:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-09-11 16:12:51,873 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-09-11 16:12:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:51,873 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-09-11 16:12:51,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-09-11 16:12:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:51,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:51,874 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:52,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:52,075 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:52,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 74 times [2020-09-11 16:12:52,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:52,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185885603] [2020-09-11 16:12:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:52,176 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 16:12:52,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185885603] [2020-09-11 16:12:52,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345330573] [2020-09-11 16:12:52,177 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 16:12:52,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:52,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:52,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:52,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:52,915 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 16:12:52,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:52,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:52,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174813903] [2020-09-11 16:12:52,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:52,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:52,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:52,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:52,916 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-09-11 16:12:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:53,306 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-09-11 16:12:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:12:53,307 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:53,308 INFO L225 Difference]: With dead ends: 198 [2020-09-11 16:12:53,308 INFO L226 Difference]: Without dead ends: 196 [2020-09-11 16:12:53,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:12:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-11 16:12:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-09-11 16:12:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 16:12:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-11 16:12:53,312 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-11 16:12:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:53,312 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-11 16:12:53,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:53,313 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-11 16:12:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:53,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:53,313 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:53,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-09-11 16:12:53,514 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:53,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:53,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 75 times [2020-09-11 16:12:53,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:53,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249506800] [2020-09-11 16:12:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:53,622 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 16:12:53,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249506800] [2020-09-11 16:12:53,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428753036] [2020-09-11 16:12:53,623 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 16:12:53,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:12:53,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:53,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:53,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:53,865 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 16:12:53,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:53,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:53,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302195701] [2020-09-11 16:12:53,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:53,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:53,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:53,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:53,866 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-11 16:12:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:54,401 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-09-11 16:12:54,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:12:54,402 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:54,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:54,404 INFO L225 Difference]: With dead ends: 209 [2020-09-11 16:12:54,404 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 16:12:54,405 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 16:12:54,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 16:12:54,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-11 16:12:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 16:12:54,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 16:12:54,408 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 16:12:54,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:54,409 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 16:12:54,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 16:12:54,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:54,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:54,410 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:54,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:12:54,614 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:54,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 76 times [2020-09-11 16:12:54,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:54,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2553511] [2020-09-11 16:12:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:54,725 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 16:12:54,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2553511] [2020-09-11 16:12:54,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285413249] [2020-09-11 16:12:54,726 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 16:12:54,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:12:54,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:54,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:54,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:54,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:54,972 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 16:12:54,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:54,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:54,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335445195] [2020-09-11 16:12:54,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:54,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:54,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:54,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:12:54,974 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 16:12:55,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:12:55,665 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-09-11 16:12:55,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:12:55,666 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:12:55,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:12:55,668 INFO L225 Difference]: With dead ends: 217 [2020-09-11 16:12:55,668 INFO L226 Difference]: Without dead ends: 212 [2020-09-11 16:12:55,668 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 16:12:55,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-11 16:12:55,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-09-11 16:12:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-11 16:12:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-11 16:12:55,672 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-09-11 16:12:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:12:55,672 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-11 16:12:55,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:12:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-11 16:12:55,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:12:55,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:12:55,673 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:12:55,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-11 16:12:55,877 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:12:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:12:55,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 77 times [2020-09-11 16:12:55,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:12:55,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863788861] [2020-09-11 16:12:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:12:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:12:55,986 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 16:12:55,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863788861] [2020-09-11 16:12:55,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295789031] [2020-09-11 16:12:55,987 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 16:12:56,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:12:56,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:12:56,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:12:56,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:12:58,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:12:58,267 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 16:12:58,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:12:58,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:12:58,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926504946] [2020-09-11 16:12:58,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:12:58,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:12:58,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:12:58,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=144, Unknown=1, NotChecked=0, Total=210 [2020-09-11 16:12:58,269 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-09-11 16:13:02,664 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-11 16:13:06,921 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-11 16:13:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:07,419 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-09-11 16:13:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:13:07,420 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:07,421 INFO L225 Difference]: With dead ends: 236 [2020-09-11 16:13:07,421 INFO L226 Difference]: Without dead ends: 228 [2020-09-11 16:13:07,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=307, Invalid=684, Unknown=1, NotChecked=0, Total=992 [2020-09-11 16:13:07,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-11 16:13:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-09-11 16:13:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 16:13:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-09-11 16:13:07,426 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-09-11 16:13:07,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:07,426 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-09-11 16:13:07,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:07,426 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-09-11 16:13:07,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:07,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:07,427 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:07,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-11 16:13:07,630 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:07,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 78 times [2020-09-11 16:13:07,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:07,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68631581] [2020-09-11 16:13:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:07,747 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 16:13:07,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68631581] [2020-09-11 16:13:07,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068707421] [2020-09-11 16:13:07,748 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 16:13:07,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:13:07,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:07,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:07,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:07,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:13:07,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:13:07,995 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 16:13:07,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:07,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:07,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728523438] [2020-09-11 16:13:07,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:07,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:07,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:07,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:07,997 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-09-11 16:13:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:08,705 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-09-11 16:13:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:13:08,705 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:08,706 INFO L225 Difference]: With dead ends: 219 [2020-09-11 16:13:08,707 INFO L226 Difference]: Without dead ends: 214 [2020-09-11 16:13:08,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=593, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:13:08,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-11 16:13:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-09-11 16:13:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 16:13:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-09-11 16:13:08,710 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-09-11 16:13:08,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:08,710 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-09-11 16:13:08,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-09-11 16:13:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:08,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:08,711 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:08,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-11 16:13:08,912 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:08,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:08,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 79 times [2020-09-11 16:13:08,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:08,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807336172] [2020-09-11 16:13:08,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:09,022 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 16:13:09,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807336172] [2020-09-11 16:13:09,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983340217] [2020-09-11 16:13:09,023 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 16:13:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:09,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:09,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:09,224 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 16:13:09,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:09,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:09,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116584212] [2020-09-11 16:13:09,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:09,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:09,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:09,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:09,225 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-09-11 16:13:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:09,572 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-09-11 16:13:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:13:09,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:09,574 INFO L225 Difference]: With dead ends: 197 [2020-09-11 16:13:09,575 INFO L226 Difference]: Without dead ends: 195 [2020-09-11 16:13:09,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:13:09,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-11 16:13:09,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-09-11 16:13:09,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 16:13:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-09-11 16:13:09,579 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-09-11 16:13:09,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:09,579 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-09-11 16:13:09,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:09,579 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-09-11 16:13:09,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:09,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:09,580 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:09,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:09,783 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:09,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:09,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 80 times [2020-09-11 16:13:09,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:09,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997639604] [2020-09-11 16:13:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:13:09,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997639604] [2020-09-11 16:13:09,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591062290] [2020-09-11 16:13:09,897 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 16:13:09,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:13:09,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:09,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:09,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:10,106 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 16:13:10,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:10,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:10,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880506410] [2020-09-11 16:13:10,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:10,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:10,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:10,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:10,107 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-09-11 16:13:10,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:10,486 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-09-11 16:13:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:13:10,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:10,488 INFO L225 Difference]: With dead ends: 202 [2020-09-11 16:13:10,488 INFO L226 Difference]: Without dead ends: 200 [2020-09-11 16:13:10,488 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 16:13:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-11 16:13:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-09-11 16:13:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 16:13:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-09-11 16:13:10,492 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-09-11 16:13:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:10,492 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-09-11 16:13:10,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-09-11 16:13:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:10,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:10,493 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:10,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-11 16:13:10,694 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:10,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 81 times [2020-09-11 16:13:10,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:10,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512526719] [2020-09-11 16:13:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:10,791 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 16:13:10,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512526719] [2020-09-11 16:13:10,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233785395] [2020-09-11 16:13:10,792 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 16:13:10,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:13:10,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:10,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:10,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:11,026 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 16:13:11,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:11,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:11,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212361703] [2020-09-11 16:13:11,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:11,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:11,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:11,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:11,028 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-09-11 16:13:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:11,430 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-09-11 16:13:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:13:11,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:11,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:11,431 INFO L225 Difference]: With dead ends: 197 [2020-09-11 16:13:11,432 INFO L226 Difference]: Without dead ends: 195 [2020-09-11 16:13:11,432 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 16:13:11,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-11 16:13:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-09-11 16:13:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:13:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-09-11 16:13:11,439 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-09-11 16:13:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:11,439 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-09-11 16:13:11,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-09-11 16:13:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:11,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:11,440 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:11,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:11,641 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:11,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:11,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 82 times [2020-09-11 16:13:11,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:11,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752464872] [2020-09-11 16:13:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:11,735 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 16:13:11,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752464872] [2020-09-11 16:13:11,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763597908] [2020-09-11 16:13:11,736 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 16:13:11,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:13:11,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:11,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:11,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:11,987 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 16:13:11,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:11,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:11,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702872319] [2020-09-11 16:13:11,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:11,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:11,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:11,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:11,989 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-09-11 16:13:12,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:12,662 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-09-11 16:13:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:13:12,663 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:12,664 INFO L225 Difference]: With dead ends: 214 [2020-09-11 16:13:12,664 INFO L226 Difference]: Without dead ends: 212 [2020-09-11 16:13:12,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:13:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-11 16:13:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-09-11 16:13:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 16:13:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-09-11 16:13:12,668 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-09-11 16:13:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:12,669 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-09-11 16:13:12,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-09-11 16:13:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:12,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:12,669 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:12,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-11 16:13:12,878 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:12,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 83 times [2020-09-11 16:13:12,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:12,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927297009] [2020-09-11 16:13:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:13,018 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 16:13:13,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927297009] [2020-09-11 16:13:13,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564157085] [2020-09-11 16:13:13,019 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 16:13:13,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:13:13,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:13,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:13,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:13,268 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 16:13:13,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:13,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:13,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563690287] [2020-09-11 16:13:13,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:13,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:13,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:13,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:13,271 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-09-11 16:13:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:13,863 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-09-11 16:13:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:13:13,864 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:13,865 INFO L225 Difference]: With dead ends: 217 [2020-09-11 16:13:13,865 INFO L226 Difference]: Without dead ends: 215 [2020-09-11 16:13:13,865 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 16:13:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-11 16:13:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-09-11 16:13:13,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 16:13:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-11 16:13:13,871 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-11 16:13:13,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:13,871 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-11 16:13:13,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:13,871 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-11 16:13:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:13,872 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:13,872 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:14,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:14,081 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:14,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:14,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 84 times [2020-09-11 16:13:14,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:14,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008394625] [2020-09-11 16:13:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:14,194 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 16:13:14,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008394625] [2020-09-11 16:13:14,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610320334] [2020-09-11 16:13:14,195 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 16:13:14,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:13:14,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:14,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:14,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:14,404 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 16:13:14,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:14,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:14,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397020343] [2020-09-11 16:13:14,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:14,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:14,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:14,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:14,406 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-11 16:13:14,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:14,931 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-09-11 16:13:14,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:13:14,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:14,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:14,933 INFO L225 Difference]: With dead ends: 211 [2020-09-11 16:13:14,933 INFO L226 Difference]: Without dead ends: 209 [2020-09-11 16:13:14,933 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 16:13:14,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-11 16:13:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-09-11 16:13:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 16:13:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 16:13:14,937 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 16:13:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:14,937 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 16:13:14,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:14,937 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 16:13:14,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:14,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:14,938 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:15,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:15,139 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:15,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 85 times [2020-09-11 16:13:15,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:15,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545755727] [2020-09-11 16:13:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:15,237 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 16:13:15,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545755727] [2020-09-11 16:13:15,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546227007] [2020-09-11 16:13:15,238 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 16:13:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:15,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:15,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:15,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:13:15,438 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 16:13:15,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:15,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:15,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704355695] [2020-09-11 16:13:15,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:15,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:15,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:15,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:15,440 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 16:13:16,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:16,036 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-09-11 16:13:16,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:13:16,037 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:16,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:16,038 INFO L225 Difference]: With dead ends: 211 [2020-09-11 16:13:16,038 INFO L226 Difference]: Without dead ends: 206 [2020-09-11 16:13:16,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:13:16,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-11 16:13:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-09-11 16:13:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 16:13:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 16:13:16,042 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 16:13:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:16,042 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 16:13:16,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 16:13:16,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:16,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:16,043 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:16,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-09-11 16:13:16,244 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:16,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:16,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 86 times [2020-09-11 16:13:16,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:16,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734259960] [2020-09-11 16:13:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:16,352 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 16:13:16,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734259960] [2020-09-11 16:13:16,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767031986] [2020-09-11 16:13:16,353 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 16:13:16,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:13:16,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:16,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:16,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:16,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:13:16,573 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 16:13:16,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:16,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:16,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652650413] [2020-09-11 16:13:16,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:16,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:16,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:16,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:16,575 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 16:13:17,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:17,349 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-09-11 16:13:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:13:17,350 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:17,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:17,351 INFO L225 Difference]: With dead ends: 227 [2020-09-11 16:13:17,351 INFO L226 Difference]: Without dead ends: 222 [2020-09-11 16:13:17,351 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 16:13:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-11 16:13:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-09-11 16:13:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 16:13:17,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-11 16:13:17,354 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-11 16:13:17,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:17,355 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-11 16:13:17,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-11 16:13:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:17,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:17,355 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:17,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-11 16:13:17,556 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:17,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 87 times [2020-09-11 16:13:17,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:17,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141364972] [2020-09-11 16:13:17,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:17,671 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 16:13:17,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141364972] [2020-09-11 16:13:17,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639986900] [2020-09-11 16:13:17,672 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 16:13:17,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:13:17,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:17,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:17,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:17,874 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 16:13:17,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:17,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:17,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923116688] [2020-09-11 16:13:17,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:17,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:17,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:17,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:17,876 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-11 16:13:18,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:18,528 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-09-11 16:13:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:13:18,529 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:18,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:18,530 INFO L225 Difference]: With dead ends: 221 [2020-09-11 16:13:18,530 INFO L226 Difference]: Without dead ends: 219 [2020-09-11 16:13:18,530 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 16:13:18,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-11 16:13:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-09-11 16:13:18,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 16:13:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 16:13:18,533 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 16:13:18,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:18,533 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 16:13:18,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:18,533 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 16:13:18,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:18,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:18,534 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:18,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:18,734 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:18,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 88 times [2020-09-11 16:13:18,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:18,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429721857] [2020-09-11 16:13:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:18,851 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 16:13:18,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429721857] [2020-09-11 16:13:18,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608957163] [2020-09-11 16:13:18,852 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 16:13:18,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:13:18,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:18,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:18,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:19,030 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:13:19,042 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 16:13:19,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:19,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:19,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090875577] [2020-09-11 16:13:19,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:19,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:19,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:19,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:19,044 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 16:13:19,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:19,812 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-09-11 16:13:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:13:19,813 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:19,814 INFO L225 Difference]: With dead ends: 240 [2020-09-11 16:13:19,815 INFO L226 Difference]: Without dead ends: 232 [2020-09-11 16:13:19,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:13:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-11 16:13:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-09-11 16:13:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-11 16:13:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-09-11 16:13:19,819 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-09-11 16:13:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:19,820 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-09-11 16:13:19,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:19,820 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-09-11 16:13:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:19,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:19,820 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:20,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-11 16:13:20,033 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:20,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 89 times [2020-09-11 16:13:20,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:20,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217603131] [2020-09-11 16:13:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:20,134 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 16:13:20,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217603131] [2020-09-11 16:13:20,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549686561] [2020-09-11 16:13:20,135 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 16:13:20,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:13:20,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:20,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:20,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:20,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:13:20,338 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 16:13:20,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:20,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:20,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122283839] [2020-09-11 16:13:20,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:20,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:20,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:20,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:20,341 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-09-11 16:13:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:21,089 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-09-11 16:13:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:13:21,090 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:21,091 INFO L225 Difference]: With dead ends: 238 [2020-09-11 16:13:21,092 INFO L226 Difference]: Without dead ends: 230 [2020-09-11 16:13:21,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=357, Invalid=833, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:13:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-11 16:13:21,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-09-11 16:13:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:13:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-11 16:13:21,096 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-11 16:13:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:21,096 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-11 16:13:21,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-11 16:13:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:21,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:21,097 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:21,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-11 16:13:21,307 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:21,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:21,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 90 times [2020-09-11 16:13:21,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:21,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79121184] [2020-09-11 16:13:21,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:21,423 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 16:13:21,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79121184] [2020-09-11 16:13:21,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515225048] [2020-09-11 16:13:21,423 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 16:13:21,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:13:21,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:21,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:21,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:21,638 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 16:13:21,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:21,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:21,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510079996] [2020-09-11 16:13:21,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:21,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:21,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:21,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:21,641 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-11 16:13:22,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:22,010 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-09-11 16:13:22,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:13:22,011 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:22,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:22,012 INFO L225 Difference]: With dead ends: 195 [2020-09-11 16:13:22,013 INFO L226 Difference]: Without dead ends: 193 [2020-09-11 16:13:22,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:13:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-11 16:13:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-09-11 16:13:22,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:13:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-11 16:13:22,016 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-11 16:13:22,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:22,017 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-11 16:13:22,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:22,017 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-11 16:13:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:22,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:22,017 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:22,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-11 16:13:22,218 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:22,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:22,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 91 times [2020-09-11 16:13:22,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:22,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142489034] [2020-09-11 16:13:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:22,332 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 16:13:22,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142489034] [2020-09-11 16:13:22,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071927760] [2020-09-11 16:13:22,333 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 16:13:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:22,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:22,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:22,544 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 16:13:22,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:22,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:13:22,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263466414] [2020-09-11 16:13:22,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:13:22,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:22,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:13:22,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:13:22,546 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-11 16:13:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:13:23,189 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-09-11 16:13:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:13:23,190 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:13:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:13:23,191 INFO L225 Difference]: With dead ends: 206 [2020-09-11 16:13:23,191 INFO L226 Difference]: Without dead ends: 204 [2020-09-11 16:13:23,191 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 16:13:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-11 16:13:23,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-09-11 16:13:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 16:13:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-09-11 16:13:23,194 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-09-11 16:13:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:13:23,194 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-09-11 16:13:23,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:13:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-09-11 16:13:23,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:13:23,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:13:23,195 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:13:23,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:13:23,396 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:13:23,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:13:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 92 times [2020-09-11 16:13:23,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:13:23,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530074478] [2020-09-11 16:13:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:13:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:13:23,514 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 16:13:23,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530074478] [2020-09-11 16:13:23,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330957961] [2020-09-11 16:13:23,515 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 16:13:23,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:13:23,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:13:23,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:13:23,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:13:23,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:13:24,900 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 16:13:24,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:13:24,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-11 16:13:24,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625542202] [2020-09-11 16:13:24,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:13:24,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:13:24,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:13:24,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=174, Unknown=1, NotChecked=0, Total=240 [2020-09-11 16:13:24,902 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-09-11 16:13:27,451 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-09-11 16:13:48,277 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-09-11 16:14:18,535 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-09-11 16:14:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:43,940 INFO L93 Difference]: Finished difference Result 242 states and 573 transitions. [2020-09-11 16:14:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:14:43,941 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-09-11 16:14:43,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:43,942 INFO L225 Difference]: With dead ends: 242 [2020-09-11 16:14:43,942 INFO L226 Difference]: Without dead ends: 237 [2020-09-11 16:14:43,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=402, Invalid=995, Unknown=9, NotChecked=0, Total=1406 [2020-09-11 16:14:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-11 16:14:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 139. [2020-09-11 16:14:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 16:14:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-09-11 16:14:43,945 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-09-11 16:14:43,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:43,945 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-09-11 16:14:43,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:14:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-09-11 16:14:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:43,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:43,945 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:44,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-11 16:14:44,146 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:44,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:44,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 93 times [2020-09-11 16:14:44,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:44,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334660075] [2020-09-11 16:14:44,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:44,244 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 16:14:44,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334660075] [2020-09-11 16:14:44,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298305698] [2020-09-11 16:14:44,245 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 16:14:44,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:14:44,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:44,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:44,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:44,458 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 16:14:44,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:44,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:44,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148659040] [2020-09-11 16:14:44,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:44,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:44,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:44,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:44,460 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-09-11 16:14:44,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:44,860 INFO L93 Difference]: Finished difference Result 192 states and 445 transitions. [2020-09-11 16:14:44,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:14:44,861 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:44,862 INFO L225 Difference]: With dead ends: 192 [2020-09-11 16:14:44,862 INFO L226 Difference]: Without dead ends: 190 [2020-09-11 16:14:44,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:14:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-11 16:14:44,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 141. [2020-09-11 16:14:44,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 16:14:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-09-11 16:14:44,865 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-09-11 16:14:44,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:44,865 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-09-11 16:14:44,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:44,865 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-09-11 16:14:44,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:44,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:44,866 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:45,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-11 16:14:45,067 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:45,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 94 times [2020-09-11 16:14:45,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:45,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121325990] [2020-09-11 16:14:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:45,180 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 16:14:45,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121325990] [2020-09-11 16:14:45,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755688021] [2020-09-11 16:14:45,181 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 16:14:45,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:14:45,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:45,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:45,412 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 16:14:45,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:45,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:45,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567461135] [2020-09-11 16:14:45,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:45,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:45,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:45,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:45,414 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-09-11 16:14:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:45,838 INFO L93 Difference]: Finished difference Result 203 states and 467 transitions. [2020-09-11 16:14:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:14:45,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:45,840 INFO L225 Difference]: With dead ends: 203 [2020-09-11 16:14:45,840 INFO L226 Difference]: Without dead ends: 201 [2020-09-11 16:14:45,841 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 16:14:45,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-11 16:14:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 142. [2020-09-11 16:14:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:14:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-09-11 16:14:45,844 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-09-11 16:14:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:45,844 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-09-11 16:14:45,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:45,844 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-09-11 16:14:45,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:45,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:45,844 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:46,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:46,046 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:46,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 95 times [2020-09-11 16:14:46,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:46,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830676879] [2020-09-11 16:14:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:46,160 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 16:14:46,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830676879] [2020-09-11 16:14:46,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98030005] [2020-09-11 16:14:46,161 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 16:14:46,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:14:46,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:46,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:46,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:46,368 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 16:14:46,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:46,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:46,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950836157] [2020-09-11 16:14:46,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:46,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:46,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:46,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:46,370 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-09-11 16:14:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:46,756 INFO L93 Difference]: Finished difference Result 194 states and 452 transitions. [2020-09-11 16:14:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:14:46,757 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:46,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:46,758 INFO L225 Difference]: With dead ends: 194 [2020-09-11 16:14:46,758 INFO L226 Difference]: Without dead ends: 192 [2020-09-11 16:14:46,758 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 16:14:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-11 16:14:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 137. [2020-09-11 16:14:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 16:14:46,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-09-11 16:14:46,762 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-09-11 16:14:46,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:46,762 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-09-11 16:14:46,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-09-11 16:14:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:46,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:46,763 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:46,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:46,973 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:46,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 96 times [2020-09-11 16:14:46,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:46,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379845436] [2020-09-11 16:14:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:47,089 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 16:14:47,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379845436] [2020-09-11 16:14:47,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047040893] [2020-09-11 16:14:47,090 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 16:14:47,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:14:47,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:47,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:47,311 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 16:14:47,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:47,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:47,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096037295] [2020-09-11 16:14:47,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:47,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:47,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:47,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:47,313 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-09-11 16:14:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:48,029 INFO L93 Difference]: Finished difference Result 210 states and 483 transitions. [2020-09-11 16:14:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:14:48,030 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:48,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:48,031 INFO L225 Difference]: With dead ends: 210 [2020-09-11 16:14:48,031 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 16:14:48,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:14:48,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 16:14:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 140. [2020-09-11 16:14:48,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 16:14:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-09-11 16:14:48,035 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-09-11 16:14:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:48,035 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-09-11 16:14:48,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:48,035 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-09-11 16:14:48,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:48,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:48,036 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:48,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:48,237 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:48,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:48,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 97 times [2020-09-11 16:14:48,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:48,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103843456] [2020-09-11 16:14:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:48,358 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 16:14:48,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103843456] [2020-09-11 16:14:48,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496984100] [2020-09-11 16:14:48,359 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 16:14:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:48,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:48,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:48,594 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 16:14:48,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:48,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:48,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331513676] [2020-09-11 16:14:48,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:48,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:48,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:48,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:48,596 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-09-11 16:14:49,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:49,253 INFO L93 Difference]: Finished difference Result 219 states and 501 transitions. [2020-09-11 16:14:49,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:14:49,254 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:49,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:49,255 INFO L225 Difference]: With dead ends: 219 [2020-09-11 16:14:49,255 INFO L226 Difference]: Without dead ends: 217 [2020-09-11 16:14:49,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=624, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:14:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-11 16:14:49,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 140. [2020-09-11 16:14:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 16:14:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-09-11 16:14:49,258 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-09-11 16:14:49,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:49,258 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-09-11 16:14:49,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:49,258 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-09-11 16:14:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:49,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:49,259 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:49,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:49,460 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:49,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 98 times [2020-09-11 16:14:49,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:49,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420816563] [2020-09-11 16:14:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:49,579 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 16:14:49,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420816563] [2020-09-11 16:14:49,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91004838] [2020-09-11 16:14:49,579 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 16:14:49,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:14:49,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:49,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:49,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:49,787 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 16:14:49,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:49,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:49,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531515722] [2020-09-11 16:14:49,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:49,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:49,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:49,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:49,790 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-09-11 16:14:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:50,348 INFO L93 Difference]: Finished difference Result 196 states and 455 transitions. [2020-09-11 16:14:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:14:50,349 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:50,349 INFO L225 Difference]: With dead ends: 196 [2020-09-11 16:14:50,350 INFO L226 Difference]: Without dead ends: 194 [2020-09-11 16:14:50,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:14:50,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-11 16:14:50,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 139. [2020-09-11 16:14:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 16:14:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-11 16:14:50,354 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-11 16:14:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:50,354 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-11 16:14:50,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-11 16:14:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:50,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:50,355 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:50,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-11 16:14:50,562 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:50,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:50,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 99 times [2020-09-11 16:14:50,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:50,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149241450] [2020-09-11 16:14:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:50,673 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 16:14:50,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149241450] [2020-09-11 16:14:50,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526403990] [2020-09-11 16:14:50,674 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 16:14:50,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:14:50,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:50,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:50,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:50,893 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 16:14:50,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:50,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:50,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409068958] [2020-09-11 16:14:50,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:50,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:50,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:50,895 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-09-11 16:14:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:51,677 INFO L93 Difference]: Finished difference Result 211 states and 490 transitions. [2020-09-11 16:14:51,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:14:51,678 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:51,679 INFO L225 Difference]: With dead ends: 211 [2020-09-11 16:14:51,680 INFO L226 Difference]: Without dead ends: 209 [2020-09-11 16:14:51,680 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 16:14:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-11 16:14:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 141. [2020-09-11 16:14:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 16:14:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-09-11 16:14:51,682 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-09-11 16:14:51,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:51,682 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-09-11 16:14:51,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-09-11 16:14:51,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:51,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:51,683 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:51,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-11 16:14:51,884 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:51,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:51,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 100 times [2020-09-11 16:14:51,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:51,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528127157] [2020-09-11 16:14:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:52,001 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 16:14:52,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528127157] [2020-09-11 16:14:52,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413037167] [2020-09-11 16:14:52,002 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 16:14:52,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:14:52,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:52,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:52,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:52,223 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 16:14:52,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:52,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:52,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806899131] [2020-09-11 16:14:52,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:52,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:52,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:52,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:52,225 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-09-11 16:14:52,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:52,979 INFO L93 Difference]: Finished difference Result 215 states and 498 transitions. [2020-09-11 16:14:52,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:14:52,980 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:52,981 INFO L225 Difference]: With dead ends: 215 [2020-09-11 16:14:52,981 INFO L226 Difference]: Without dead ends: 213 [2020-09-11 16:14:52,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:14:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-11 16:14:52,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-09-11 16:14:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:14:52,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-11 16:14:52,987 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-11 16:14:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:52,987 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-11 16:14:52,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-11 16:14:52,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:52,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:52,988 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:53,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-11 16:14:53,192 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:53,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 101 times [2020-09-11 16:14:53,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:53,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352234739] [2020-09-11 16:14:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:53,297 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 16:14:53,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352234739] [2020-09-11 16:14:53,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564241720] [2020-09-11 16:14:53,298 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 16:14:53,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:14:53,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:53,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:53,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:53,511 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 16:14:53,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:53,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:53,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570820496] [2020-09-11 16:14:53,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:53,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:53,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:53,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:53,513 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-11 16:14:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:54,285 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-11 16:14:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:14:54,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:54,287 INFO L225 Difference]: With dead ends: 202 [2020-09-11 16:14:54,287 INFO L226 Difference]: Without dead ends: 200 [2020-09-11 16:14:54,287 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 16:14:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-11 16:14:54,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2020-09-11 16:14:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 16:14:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 16:14:54,291 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 16:14:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:54,291 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 16:14:54,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 16:14:54,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:54,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:54,292 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:54,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:54,496 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:54,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:54,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 102 times [2020-09-11 16:14:54,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:54,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544111675] [2020-09-11 16:14:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:54,609 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 16:14:54,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544111675] [2020-09-11 16:14:54,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011411784] [2020-09-11 16:14:54,610 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 16:14:54,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:14:54,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:54,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:54,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:54,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:14:54,800 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 16:14:54,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:54,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:54,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797739655] [2020-09-11 16:14:54,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:54,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:54,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:54,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:54,802 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 16:14:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:55,535 INFO L93 Difference]: Finished difference Result 196 states and 472 transitions. [2020-09-11 16:14:55,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:14:55,536 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:55,537 INFO L225 Difference]: With dead ends: 196 [2020-09-11 16:14:55,537 INFO L226 Difference]: Without dead ends: 191 [2020-09-11 16:14:55,538 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 16:14:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-11 16:14:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 144. [2020-09-11 16:14:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 16:14:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 16:14:55,541 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 16:14:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:55,541 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 16:14:55,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 16:14:55,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:55,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:55,542 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:55,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-11 16:14:55,745 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:55,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 103 times [2020-09-11 16:14:55,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:55,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585856885] [2020-09-11 16:14:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:55,864 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 16:14:55,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585856885] [2020-09-11 16:14:55,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245898420] [2020-09-11 16:14:55,865 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 16:14:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:55,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:55,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:56,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:14:56,096 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 16:14:56,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:56,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:56,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012950168] [2020-09-11 16:14:56,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:56,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:56,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:56,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:56,098 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 16:14:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:57,179 INFO L93 Difference]: Finished difference Result 227 states and 547 transitions. [2020-09-11 16:14:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:14:57,180 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:57,181 INFO L225 Difference]: With dead ends: 227 [2020-09-11 16:14:57,181 INFO L226 Difference]: Without dead ends: 222 [2020-09-11 16:14:57,181 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 16:14:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-11 16:14:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 142. [2020-09-11 16:14:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 16:14:57,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-11 16:14:57,186 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-11 16:14:57,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:57,186 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-11 16:14:57,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-11 16:14:57,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:57,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:57,187 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:57,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:14:57,390 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:57,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:57,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 104 times [2020-09-11 16:14:57,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:57,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524119755] [2020-09-11 16:14:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:57,511 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 16:14:57,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524119755] [2020-09-11 16:14:57,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611541387] [2020-09-11 16:14:57,512 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 16:14:57,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:14:57,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:57,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:57,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:57,732 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 16:14:57,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:57,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:57,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765411366] [2020-09-11 16:14:57,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:57,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:57,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:57,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:57,733 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-11 16:14:58,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:14:58,609 INFO L93 Difference]: Finished difference Result 226 states and 535 transitions. [2020-09-11 16:14:58,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:14:58,610 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:14:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:14:58,610 INFO L225 Difference]: With dead ends: 226 [2020-09-11 16:14:58,611 INFO L226 Difference]: Without dead ends: 224 [2020-09-11 16:14:58,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:14:58,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-11 16:14:58,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 144. [2020-09-11 16:14:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 16:14:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 16:14:58,614 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 16:14:58,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:14:58,614 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 16:14:58,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:14:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 16:14:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:14:58,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:14:58,615 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:14:58,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-11 16:14:58,816 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:14:58,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:14:58,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 105 times [2020-09-11 16:14:58,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:14:58,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610954779] [2020-09-11 16:14:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:14:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:14:58,937 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 16:14:58,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610954779] [2020-09-11 16:14:58,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33928654] [2020-09-11 16:14:58,938 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 16:14:58,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:14:58,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:14:58,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:14:58,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:14:59,137 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:14:59,185 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 16:14:59,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:14:59,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:14:59,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577085422] [2020-09-11 16:14:59,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:14:59,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:14:59,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:14:59,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:14:59,187 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 16:15:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:00,408 INFO L93 Difference]: Finished difference Result 247 states and 597 transitions. [2020-09-11 16:15:00,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:15:00,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:15:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:00,410 INFO L225 Difference]: With dead ends: 247 [2020-09-11 16:15:00,410 INFO L226 Difference]: Without dead ends: 239 [2020-09-11 16:15:00,411 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 16:15:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-11 16:15:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 146. [2020-09-11 16:15:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-11 16:15:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-09-11 16:15:00,414 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-09-11 16:15:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:00,414 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-09-11 16:15:00,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:15:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-09-11 16:15:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:00,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:00,415 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:00,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:00,615 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:00,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 106 times [2020-09-11 16:15:00,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:00,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945775698] [2020-09-11 16:15:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:00,734 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 16:15:00,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945775698] [2020-09-11 16:15:00,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107512054] [2020-09-11 16:15:00,736 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 16:15:00,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:15:00,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:00,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:15:00,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:00,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:15:00,960 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 16:15:00,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:00,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:15:00,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738868036] [2020-09-11 16:15:00,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:15:00,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:00,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:15:00,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:15:00,962 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-09-11 16:15:02,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:02,179 INFO L93 Difference]: Finished difference Result 246 states and 590 transitions. [2020-09-11 16:15:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:15:02,180 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:15:02,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:02,181 INFO L225 Difference]: With dead ends: 246 [2020-09-11 16:15:02,182 INFO L226 Difference]: Without dead ends: 238 [2020-09-11 16:15:02,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:15:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-11 16:15:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-09-11 16:15:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 16:15:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-09-11 16:15:02,186 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-09-11 16:15:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:02,186 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-09-11 16:15:02,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:15:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-09-11 16:15:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:02,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:02,187 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:02,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-09-11 16:15:02,398 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:02,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:02,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 107 times [2020-09-11 16:15:02,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:02,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998584739] [2020-09-11 16:15:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:02,509 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 16:15:02,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998584739] [2020-09-11 16:15:02,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638127613] [2020-09-11 16:15:02,510 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 16:15:02,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:15:02,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:02,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:15:02,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:02,746 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 16:15:02,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:02,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:15:02,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228552170] [2020-09-11 16:15:02,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:15:02,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:02,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:15:02,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:15:02,747 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-09-11 16:15:03,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:03,437 INFO L93 Difference]: Finished difference Result 209 states and 489 transitions. [2020-09-11 16:15:03,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:15:03,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:15:03,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:03,440 INFO L225 Difference]: With dead ends: 209 [2020-09-11 16:15:03,440 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 16:15:03,440 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 16:15:03,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 16:15:03,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 136. [2020-09-11 16:15:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 16:15:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-09-11 16:15:03,444 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-09-11 16:15:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:03,445 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-09-11 16:15:03,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:15:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-09-11 16:15:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:03,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:03,445 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:03,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:03,657 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 108 times [2020-09-11 16:15:03,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:03,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816369467] [2020-09-11 16:15:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:03,776 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 16:15:03,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816369467] [2020-09-11 16:15:03,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141796905] [2020-09-11 16:15:03,777 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 16:15:03,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:15:03,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:03,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:15:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:04,007 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 16:15:04,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:04,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:15:04,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518352321] [2020-09-11 16:15:04,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:15:04,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:04,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:15:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:15:04,009 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-09-11 16:15:04,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:04,912 INFO L93 Difference]: Finished difference Result 205 states and 487 transitions. [2020-09-11 16:15:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:15:04,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:15:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:04,914 INFO L225 Difference]: With dead ends: 205 [2020-09-11 16:15:04,915 INFO L226 Difference]: Without dead ends: 203 [2020-09-11 16:15:04,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:15:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-11 16:15:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 137. [2020-09-11 16:15:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 16:15:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-11 16:15:04,918 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-11 16:15:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:04,918 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-11 16:15:04,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:15:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-11 16:15:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:04,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:04,918 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:05,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-11 16:15:05,119 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:05,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:05,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 109 times [2020-09-11 16:15:05,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:05,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987898273] [2020-09-11 16:15:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:05,250 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 16:15:05,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987898273] [2020-09-11 16:15:05,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41628767] [2020-09-11 16:15:05,251 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 16:15:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:05,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:15:05,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:05,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:15:05,465 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 16:15:05,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:05,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:15:05,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069514017] [2020-09-11 16:15:05,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:15:05,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:05,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:15:05,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:15:05,467 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-11 16:15:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:06,604 INFO L93 Difference]: Finished difference Result 228 states and 547 transitions. [2020-09-11 16:15:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:15:06,605 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:15:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:06,606 INFO L225 Difference]: With dead ends: 228 [2020-09-11 16:15:06,606 INFO L226 Difference]: Without dead ends: 220 [2020-09-11 16:15:06,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:15:06,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-11 16:15:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 137. [2020-09-11 16:15:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 16:15:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-11 16:15:06,610 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-11 16:15:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:06,610 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-11 16:15:06,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:15:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-11 16:15:06,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:06,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:06,611 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:06,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-11 16:15:06,818 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:06,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:06,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 110 times [2020-09-11 16:15:06,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:06,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556088086] [2020-09-11 16:15:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:15:06,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556088086] [2020-09-11 16:15:06,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796414819] [2020-09-11 16:15:06,947 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 16:15:06,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:15:06,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:06,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:15:06,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:07,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:15:07,146 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 16:15:07,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:07,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:15:07,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144317726] [2020-09-11 16:15:07,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:15:07,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:07,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:15:07,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:15:07,147 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-11 16:15:08,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:08,168 INFO L93 Difference]: Finished difference Result 228 states and 550 transitions. [2020-09-11 16:15:08,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:15:08,169 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:15:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:08,171 INFO L225 Difference]: With dead ends: 228 [2020-09-11 16:15:08,171 INFO L226 Difference]: Without dead ends: 220 [2020-09-11 16:15:08,171 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 16:15:08,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-11 16:15:08,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 133. [2020-09-11 16:15:08,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-11 16:15:08,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-09-11 16:15:08,175 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-09-11 16:15:08,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:08,175 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-09-11 16:15:08,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:15:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-09-11 16:15:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:08,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:08,176 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:08,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-11 16:15:08,385 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:08,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:08,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 111 times [2020-09-11 16:15:08,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:08,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405876987] [2020-09-11 16:15:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:08,516 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 16:15:08,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405876987] [2020-09-11 16:15:08,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153756322] [2020-09-11 16:15:08,517 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 16:15:08,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:15:08,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:08,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:15:08,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:08,725 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:15:08,742 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 16:15:08,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:08,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 16:15:08,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63223419] [2020-09-11 16:15:08,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:15:08,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:08,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:15:08,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:15:08,744 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-09-11 16:15:09,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:09,928 INFO L93 Difference]: Finished difference Result 224 states and 533 transitions. [2020-09-11 16:15:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:15:09,930 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 16:15:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:09,931 INFO L225 Difference]: With dead ends: 224 [2020-09-11 16:15:09,931 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 16:15:09,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:15:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 16:15:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 130. [2020-09-11 16:15:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-11 16:15:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-09-11 16:15:09,934 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-09-11 16:15:09,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:09,934 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-09-11 16:15:09,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:15:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-09-11 16:15:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:09,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:09,935 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:10,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:10,136 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:10,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:10,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-09-11 16:15:10,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:10,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670012516] [2020-09-11 16:15:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:10,306 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 16:15:10,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670012516] [2020-09-11 16:15:10,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124340045] [2020-09-11 16:15:10,307 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 16:15:10,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:15:10,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:10,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:10,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:10,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:15:10,607 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 16:15:10,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:10,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-11 16:15:10,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4524179] [2020-09-11 16:15:10,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:15:10,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:10,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:15:10,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:15:10,609 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-09-11 16:15:10,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:10,935 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-09-11 16:15:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:15:10,937 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-09-11 16:15:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:10,938 INFO L225 Difference]: With dead ends: 185 [2020-09-11 16:15:10,938 INFO L226 Difference]: Without dead ends: 180 [2020-09-11 16:15:10,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:15:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-11 16:15:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-09-11 16:15:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 16:15:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-11 16:15:10,943 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-11 16:15:10,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:10,943 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-11 16:15:10,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:15:10,944 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-11 16:15:10,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:10,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:10,945 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:11,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:11,146 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:11,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:11,146 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-09-11 16:15:11,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:11,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801446892] [2020-09-11 16:15:11,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:11,320 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 16:15:11,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801446892] [2020-09-11 16:15:11,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968073237] [2020-09-11 16:15:11,321 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 16:15:11,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:15:11,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:11,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:11,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:11,562 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 16:15:11,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:11,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:11,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449965844] [2020-09-11 16:15:11,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:11,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:11,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:11,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:11,564 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-09-11 16:15:11,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:11,884 INFO L93 Difference]: Finished difference Result 186 states and 435 transitions. [2020-09-11 16:15:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:15:11,885 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:15:11,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:11,886 INFO L225 Difference]: With dead ends: 186 [2020-09-11 16:15:11,886 INFO L226 Difference]: Without dead ends: 183 [2020-09-11 16:15:11,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:15:11,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-11 16:15:11,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2020-09-11 16:15:11,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-11 16:15:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-11 16:15:11,892 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-11 16:15:11,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:11,892 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-11 16:15:11,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:11,892 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-11 16:15:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:11,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:11,893 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:12,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-11 16:15:12,103 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:12,104 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-09-11 16:15:12,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:12,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763717110] [2020-09-11 16:15:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:12,252 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 16:15:12,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763717110] [2020-09-11 16:15:12,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70178231] [2020-09-11 16:15:12,253 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 16:15:12,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:15:12,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:12,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:12,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:12,555 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 16:15:12,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:12,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:12,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890370172] [2020-09-11 16:15:12,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:12,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:12,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:12,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:12,556 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-11 16:15:12,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:12,980 INFO L93 Difference]: Finished difference Result 203 states and 468 transitions. [2020-09-11 16:15:12,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:15:12,982 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:15:12,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:12,982 INFO L225 Difference]: With dead ends: 203 [2020-09-11 16:15:12,983 INFO L226 Difference]: Without dead ends: 200 [2020-09-11 16:15:12,983 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 16:15:12,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-11 16:15:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 148. [2020-09-11 16:15:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-11 16:15:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-11 16:15:12,987 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-11 16:15:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:12,987 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-11 16:15:12,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:12,987 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-11 16:15:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:12,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:12,988 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:13,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-11 16:15:13,189 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:13,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:13,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-09-11 16:15:13,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:13,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360284197] [2020-09-11 16:15:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:13,329 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 16:15:13,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360284197] [2020-09-11 16:15:13,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769521324] [2020-09-11 16:15:13,330 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 16:15:13,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:15:13,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:13,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:13,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:13,620 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 16:15:13,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:13,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:13,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672415343] [2020-09-11 16:15:13,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:13,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:13,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:13,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:13,622 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-11 16:15:14,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:14,186 INFO L93 Difference]: Finished difference Result 211 states and 486 transitions. [2020-09-11 16:15:14,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:15:14,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:15:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:14,188 INFO L225 Difference]: With dead ends: 211 [2020-09-11 16:15:14,188 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 16:15:14,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:15:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 16:15:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 149. [2020-09-11 16:15:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-11 16:15:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-09-11 16:15:14,192 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-09-11 16:15:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:14,192 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-09-11 16:15:14,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:14,192 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-09-11 16:15:14,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:14,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:14,192 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:14,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:14,393 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:14,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-09-11 16:15:14,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:14,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363929946] [2020-09-11 16:15:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:14,526 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 16:15:14,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363929946] [2020-09-11 16:15:14,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6121341] [2020-09-11 16:15:14,527 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 16:15:14,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:15:14,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:14,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:14,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:14,789 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 16:15:14,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:14,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:14,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734318809] [2020-09-11 16:15:14,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:14,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:14,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:14,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:14,790 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-09-11 16:15:15,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:15,440 INFO L93 Difference]: Finished difference Result 213 states and 492 transitions. [2020-09-11 16:15:15,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:15:15,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:15:15,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:15,442 INFO L225 Difference]: With dead ends: 213 [2020-09-11 16:15:15,442 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 16:15:15,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:15:15,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 16:15:15,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 150. [2020-09-11 16:15:15,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-11 16:15:15,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-09-11 16:15:15,446 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-09-11 16:15:15,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:15,446 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-09-11 16:15:15,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:15,447 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-09-11 16:15:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:15,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:15,447 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:15,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:15,648 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:15,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:15,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-09-11 16:15:15,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:15,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390251696] [2020-09-11 16:15:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:15,800 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 16:15:15,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390251696] [2020-09-11 16:15:15,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236576616] [2020-09-11 16:15:15,801 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 16:15:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:15,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:15,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:16,055 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 16:15:16,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:16,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:16,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925918936] [2020-09-11 16:15:16,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:16,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:16,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:16,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:16,057 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-09-11 16:15:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:16,649 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2020-09-11 16:15:16,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:15:16,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:15:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:16,651 INFO L225 Difference]: With dead ends: 207 [2020-09-11 16:15:16,651 INFO L226 Difference]: Without dead ends: 204 [2020-09-11 16:15:16,652 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 16:15:16,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-11 16:15:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 152. [2020-09-11 16:15:16,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-11 16:15:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-09-11 16:15:16,655 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-09-11 16:15:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:16,655 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-09-11 16:15:16,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-09-11 16:15:16,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:16,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:16,655 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:16,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:16,856 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:16,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:16,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-09-11 16:15:16,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:16,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658815844] [2020-09-11 16:15:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:17,004 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 16:15:17,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658815844] [2020-09-11 16:15:17,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230555104] [2020-09-11 16:15:17,005 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 16:15:17,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:15:17,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:17,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:17,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:17,270 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 16:15:17,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:17,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:17,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900165861] [2020-09-11 16:15:17,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:17,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:17,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:17,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:17,272 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-09-11 16:15:17,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:17,743 INFO L93 Difference]: Finished difference Result 197 states and 464 transitions. [2020-09-11 16:15:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:15:17,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:15:17,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:17,747 INFO L225 Difference]: With dead ends: 197 [2020-09-11 16:15:17,747 INFO L226 Difference]: Without dead ends: 194 [2020-09-11 16:15:17,747 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 16:15:17,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-11 16:15:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 154. [2020-09-11 16:15:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-11 16:15:17,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-09-11 16:15:17,750 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-09-11 16:15:17,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:17,750 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-09-11 16:15:17,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:17,751 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-09-11 16:15:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:15:17,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:17,751 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:17,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-09-11 16:15:17,952 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:17,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-09-11 16:15:17,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:17,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146162568] [2020-09-11 16:15:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:18,084 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 16:15:18,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146162568] [2020-09-11 16:15:18,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609067379] [2020-09-11 16:15:18,085 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 16:15:18,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:15:18,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:18,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:18,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:18,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:15:18,298 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 16:15:18,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:18,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:18,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426869746] [2020-09-11 16:15:18,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:18,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:18,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:18,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:18,300 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-09-11 16:15:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:18,869 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-11 16:15:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:15:18,871 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 16:15:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:18,871 INFO L225 Difference]: With dead ends: 202 [2020-09-11 16:15:18,872 INFO L226 Difference]: Without dead ends: 196 [2020-09-11 16:15:18,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:15:18,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-11 16:15:18,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-09-11 16:15:18,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-11 16:15:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-09-11 16:15:18,875 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-09-11 16:15:18,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:18,875 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-09-11 16:15:18,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:18,875 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-09-11 16:15:18,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:18,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:18,876 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:19,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-11 16:15:19,077 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:19,077 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 112 times [2020-09-11 16:15:19,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:19,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47782115] [2020-09-11 16:15:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:19,232 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 16:15:19,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47782115] [2020-09-11 16:15:19,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124973350] [2020-09-11 16:15:19,232 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 16:15:19,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:15:19,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:19,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:19,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:19,504 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 16:15:19,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:19,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:19,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279236724] [2020-09-11 16:15:19,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:19,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:19,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:19,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:19,506 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-09-11 16:15:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:19,592 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-09-11 16:15:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:15:19,593 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:19,594 INFO L225 Difference]: With dead ends: 188 [2020-09-11 16:15:19,594 INFO L226 Difference]: Without dead ends: 186 [2020-09-11 16:15:19,594 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 16:15:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-11 16:15:19,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-09-11 16:15:19,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-11 16:15:19,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-09-11 16:15:19,598 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-09-11 16:15:19,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:19,598 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-09-11 16:15:19,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-09-11 16:15:19,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:19,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:19,598 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:19,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-11 16:15:19,799 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:19,800 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 113 times [2020-09-11 16:15:19,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:19,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602620584] [2020-09-11 16:15:19,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:19,955 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 16:15:19,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602620584] [2020-09-11 16:15:19,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549885788] [2020-09-11 16:15:19,956 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 16:15:20,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:15:20,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:20,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:20,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:20,227 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 16:15:20,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:20,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:20,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980317872] [2020-09-11 16:15:20,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:20,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:20,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:20,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:20,228 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-09-11 16:15:20,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:20,372 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-09-11 16:15:20,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:15:20,373 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:20,374 INFO L225 Difference]: With dead ends: 199 [2020-09-11 16:15:20,374 INFO L226 Difference]: Without dead ends: 197 [2020-09-11 16:15:20,374 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 16:15:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-11 16:15:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-09-11 16:15:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-11 16:15:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-11 16:15:20,378 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-11 16:15:20,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:20,378 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-11 16:15:20,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:20,378 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-11 16:15:20,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:20,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:20,379 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:20,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-11 16:15:20,587 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:20,587 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 114 times [2020-09-11 16:15:20,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:20,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401262747] [2020-09-11 16:15:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:20,738 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 16:15:20,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401262747] [2020-09-11 16:15:20,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965777495] [2020-09-11 16:15:20,739 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 16:15:20,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:15:20,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:20,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:20,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:21,051 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 16:15:21,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:21,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:21,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173206050] [2020-09-11 16:15:21,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:21,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:21,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:21,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:21,052 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-11 16:15:21,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:21,329 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-11 16:15:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:15:21,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:21,331 INFO L225 Difference]: With dead ends: 210 [2020-09-11 16:15:21,331 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 16:15:21,332 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 16:15:21,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 16:15:21,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-09-11 16:15:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-11 16:15:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-09-11 16:15:21,334 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-09-11 16:15:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:21,334 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-09-11 16:15:21,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:21,335 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-09-11 16:15:21,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:21,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:21,335 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:21,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-11 16:15:21,536 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:21,537 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 115 times [2020-09-11 16:15:21,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:21,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988946744] [2020-09-11 16:15:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:21,685 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 16:15:21,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988946744] [2020-09-11 16:15:21,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379068231] [2020-09-11 16:15:21,686 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 16:15:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:21,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:21,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:23,579 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 16:15:23,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:23,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:23,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836282405] [2020-09-11 16:15:23,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:23,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:23,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:23,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:23,580 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-09-11 16:15:23,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:23,926 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-11 16:15:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:15:23,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:23,928 INFO L225 Difference]: With dead ends: 210 [2020-09-11 16:15:23,928 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 16:15:23,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:15:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 16:15:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-09-11 16:15:23,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-11 16:15:23,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-11 16:15:23,932 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-11 16:15:23,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:23,932 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-11 16:15:23,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-11 16:15:23,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:23,932 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:23,932 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:24,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-11 16:15:24,133 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:24,134 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 116 times [2020-09-11 16:15:24,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:24,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509657056] [2020-09-11 16:15:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:24,284 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 16:15:24,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509657056] [2020-09-11 16:15:24,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282876105] [2020-09-11 16:15:24,284 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 16:15:24,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:15:24,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:24,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:24,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:28,095 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 16:15:28,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:28,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:28,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378096700] [2020-09-11 16:15:28,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:28,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:28,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:28,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-09-11 16:15:28,096 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-11 16:15:32,315 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-11 16:15:32,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:32,569 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-11 16:15:32,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:15:32,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:32,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:32,571 INFO L225 Difference]: With dead ends: 218 [2020-09-11 16:15:32,571 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 16:15:32,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=144, Invalid=317, Unknown=1, NotChecked=0, Total=462 [2020-09-11 16:15:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 16:15:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-11 16:15:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 16:15:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 16:15:32,576 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 16:15:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:32,576 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 16:15:32,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 16:15:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:32,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:32,577 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:32,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:32,789 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:32,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:32,789 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 117 times [2020-09-11 16:15:32,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:32,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735437080] [2020-09-11 16:15:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:32,950 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 16:15:32,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735437080] [2020-09-11 16:15:32,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672576990] [2020-09-11 16:15:32,951 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 16:15:33,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:15:33,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:33,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:33,287 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 16:15:33,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:33,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:33,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762207350] [2020-09-11 16:15:33,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:33,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:33,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:33,289 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 16:15:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:33,703 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-09-11 16:15:33,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:15:33,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:33,706 INFO L225 Difference]: With dead ends: 212 [2020-09-11 16:15:33,706 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 16:15:33,706 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 16:15:33,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 16:15:33,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-09-11 16:15:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-11 16:15:33,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-09-11 16:15:33,710 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-09-11 16:15:33,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:33,710 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-09-11 16:15:33,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-09-11 16:15:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:33,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:33,711 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:33,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-11 16:15:33,911 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:33,912 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 118 times [2020-09-11 16:15:33,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:33,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317856818] [2020-09-11 16:15:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:34,070 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 16:15:34,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317856818] [2020-09-11 16:15:34,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228336714] [2020-09-11 16:15:34,071 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 16:15:34,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:15:34,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:34,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:34,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:34,370 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 16:15:34,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:34,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:34,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912484690] [2020-09-11 16:15:34,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:34,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:34,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:34,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:34,372 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-09-11 16:15:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:34,795 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-11 16:15:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:15:34,796 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:34,797 INFO L225 Difference]: With dead ends: 212 [2020-09-11 16:15:34,797 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 16:15:34,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:15:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 16:15:34,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-09-11 16:15:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 16:15:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 16:15:34,801 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 16:15:34,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:34,801 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 16:15:34,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 16:15:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:34,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:34,802 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:35,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:35,010 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:35,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:35,011 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 119 times [2020-09-11 16:15:35,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:35,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562568517] [2020-09-11 16:15:35,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:35,163 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 16:15:35,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562568517] [2020-09-11 16:15:35,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601291223] [2020-09-11 16:15:35,166 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 16:15:35,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:15:35,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:35,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:35,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:35,435 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 16:15:35,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:35,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:35,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026128812] [2020-09-11 16:15:35,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:35,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:35,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:35,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:35,437 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 16:15:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:35,885 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-09-11 16:15:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:15:35,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:35,887 INFO L225 Difference]: With dead ends: 224 [2020-09-11 16:15:35,888 INFO L226 Difference]: Without dead ends: 222 [2020-09-11 16:15:35,888 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 16:15:35,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-11 16:15:35,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-09-11 16:15:35,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 16:15:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 16:15:35,891 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 16:15:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:35,891 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 16:15:35,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:35,892 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 16:15:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:35,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:35,892 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:36,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:36,093 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:36,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:36,094 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 120 times [2020-09-11 16:15:36,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:36,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528261172] [2020-09-11 16:15:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:36,247 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 16:15:36,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528261172] [2020-09-11 16:15:36,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065290131] [2020-09-11 16:15:36,248 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 16:15:36,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:15:36,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:36,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:36,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:36,535 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 16:15:36,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:36,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:36,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223405314] [2020-09-11 16:15:36,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:36,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:36,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:36,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:36,537 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 16:15:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:36,929 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-09-11 16:15:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:15:36,930 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:36,931 INFO L225 Difference]: With dead ends: 218 [2020-09-11 16:15:36,931 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 16:15:36,932 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 16:15:36,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 16:15:36,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-11 16:15:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 16:15:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 16:15:36,935 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 16:15:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:36,935 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 16:15:36,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:36,936 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 16:15:36,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:36,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:36,936 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:37,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:37,140 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:37,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:37,140 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 121 times [2020-09-11 16:15:37,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:37,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546939256] [2020-09-11 16:15:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:37,304 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 16:15:37,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546939256] [2020-09-11 16:15:37,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044309629] [2020-09-11 16:15:37,305 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 16:15:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:37,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:37,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:37,571 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 16:15:37,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:37,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:37,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876436124] [2020-09-11 16:15:37,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:37,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:37,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:37,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:37,573 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 16:15:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:37,833 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-09-11 16:15:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:15:37,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:37,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:37,835 INFO L225 Difference]: With dead ends: 206 [2020-09-11 16:15:37,835 INFO L226 Difference]: Without dead ends: 204 [2020-09-11 16:15:37,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:15:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-11 16:15:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-09-11 16:15:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-11 16:15:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-09-11 16:15:37,838 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-09-11 16:15:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:37,838 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-09-11 16:15:37,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-09-11 16:15:37,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:37,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:37,839 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:38,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:38,040 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:38,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:38,040 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 122 times [2020-09-11 16:15:38,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:38,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769525036] [2020-09-11 16:15:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:38,172 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 16:15:38,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769525036] [2020-09-11 16:15:38,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170932741] [2020-09-11 16:15:38,173 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 16:15:38,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:15:38,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:38,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:38,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:38,464 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 16:15:38,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:38,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:38,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732237609] [2020-09-11 16:15:38,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:38,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:38,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:38,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:38,466 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-09-11 16:15:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:39,070 INFO L93 Difference]: Finished difference Result 210 states and 502 transitions. [2020-09-11 16:15:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:15:39,072 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:39,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:39,073 INFO L225 Difference]: With dead ends: 210 [2020-09-11 16:15:39,073 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 16:15:39,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:15:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 16:15:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 159. [2020-09-11 16:15:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-11 16:15:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-09-11 16:15:39,079 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-09-11 16:15:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:39,079 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-09-11 16:15:39,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-09-11 16:15:39,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:39,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:39,081 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:39,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-11 16:15:39,292 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 123 times [2020-09-11 16:15:39,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:39,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032760878] [2020-09-11 16:15:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:39,486 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 16:15:39,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032760878] [2020-09-11 16:15:39,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722566993] [2020-09-11 16:15:39,487 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 16:15:39,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:15:39,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:39,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:39,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:39,795 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 16:15:39,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:39,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:39,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195732796] [2020-09-11 16:15:39,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:39,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:39,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:39,796 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-09-11 16:15:40,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:40,277 INFO L93 Difference]: Finished difference Result 216 states and 515 transitions. [2020-09-11 16:15:40,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:15:40,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:40,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:40,279 INFO L225 Difference]: With dead ends: 216 [2020-09-11 16:15:40,279 INFO L226 Difference]: Without dead ends: 214 [2020-09-11 16:15:40,279 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 16:15:40,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-11 16:15:40,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 158. [2020-09-11 16:15:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-11 16:15:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-09-11 16:15:40,282 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-09-11 16:15:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:40,282 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-09-11 16:15:40,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-09-11 16:15:40,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:40,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:40,283 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:40,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-11 16:15:40,484 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 124 times [2020-09-11 16:15:40,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:40,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932963616] [2020-09-11 16:15:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:40,629 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 16:15:40,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932963616] [2020-09-11 16:15:40,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254350059] [2020-09-11 16:15:40,629 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 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 16:15:40,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:15:40,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:40,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:40,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:43,338 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 16:15:43,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:43,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:43,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334375078] [2020-09-11 16:15:43,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:43,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:43,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:43,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:43,339 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-09-11 16:15:43,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:43,860 INFO L93 Difference]: Finished difference Result 227 states and 536 transitions. [2020-09-11 16:15:43,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:15:43,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:43,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:43,862 INFO L225 Difference]: With dead ends: 227 [2020-09-11 16:15:43,862 INFO L226 Difference]: Without dead ends: 225 [2020-09-11 16:15:43,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:15:43,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-11 16:15:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-11 16:15:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-11 16:15:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-09-11 16:15:43,866 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-09-11 16:15:43,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:43,866 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-09-11 16:15:43,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:43,866 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-09-11 16:15:43,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:43,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:43,867 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:44,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-11 16:15:44,068 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:44,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:44,068 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 125 times [2020-09-11 16:15:44,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:44,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451719545] [2020-09-11 16:15:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:44,193 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 16:15:44,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451719545] [2020-09-11 16:15:44,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057093657] [2020-09-11 16:15:44,194 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 16:15:44,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:15:44,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:44,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:44,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:44,463 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 16:15:44,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:44,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:44,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781814923] [2020-09-11 16:15:44,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:44,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:44,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:44,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:44,465 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-09-11 16:15:44,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:44,939 INFO L93 Difference]: Finished difference Result 219 states and 521 transitions. [2020-09-11 16:15:44,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:15:44,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:44,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:44,941 INFO L225 Difference]: With dead ends: 219 [2020-09-11 16:15:44,941 INFO L226 Difference]: Without dead ends: 217 [2020-09-11 16:15:44,941 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 16:15:44,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-11 16:15:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-09-11 16:15:44,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-11 16:15:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-09-11 16:15:44,944 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-09-11 16:15:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:44,945 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-09-11 16:15:44,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-09-11 16:15:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:44,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:44,946 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:45,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-11 16:15:45,149 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:45,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:45,150 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 126 times [2020-09-11 16:15:45,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:45,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25075406] [2020-09-11 16:15:45,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:45,293 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 16:15:45,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25075406] [2020-09-11 16:15:45,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14490808] [2020-09-11 16:15:45,294 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 16:15:45,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:15:45,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:45,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:45,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:45,615 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 16:15:45,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:45,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:45,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172676627] [2020-09-11 16:15:45,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:45,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:45,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:45,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:45,616 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-09-11 16:15:46,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:46,094 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-11 16:15:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:15:46,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:46,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:46,096 INFO L225 Difference]: With dead ends: 218 [2020-09-11 16:15:46,097 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 16:15:46,097 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 16:15:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 16:15:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 160. [2020-09-11 16:15:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-11 16:15:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-09-11 16:15:46,100 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-09-11 16:15:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:46,100 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-09-11 16:15:46,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-09-11 16:15:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:46,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:46,100 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:46,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:46,301 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:46,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:46,302 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 127 times [2020-09-11 16:15:46,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:46,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443275739] [2020-09-11 16:15:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:46,447 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 16:15:46,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443275739] [2020-09-11 16:15:46,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344299823] [2020-09-11 16:15:46,448 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 16:15:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:46,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:46,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:46,725 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 16:15:46,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:46,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:46,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450574445] [2020-09-11 16:15:46,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:46,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:46,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:46,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:46,726 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-09-11 16:15:47,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:47,117 INFO L93 Difference]: Finished difference Result 209 states and 498 transitions. [2020-09-11 16:15:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:15:47,118 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:47,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:47,119 INFO L225 Difference]: With dead ends: 209 [2020-09-11 16:15:47,119 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 16:15:47,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:15:47,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 16:15:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 158. [2020-09-11 16:15:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-11 16:15:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-09-11 16:15:47,123 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-09-11 16:15:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:47,123 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-09-11 16:15:47,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-09-11 16:15:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:47,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:47,123 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:47,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-09-11 16:15:47,324 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:47,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:47,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 128 times [2020-09-11 16:15:47,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:47,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434452780] [2020-09-11 16:15:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:47,579 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 16:15:47,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434452780] [2020-09-11 16:15:47,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647257784] [2020-09-11 16:15:47,580 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 16:15:47,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:15:47,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:47,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:47,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:47,859 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 16:15:47,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:47,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:47,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647868261] [2020-09-11 16:15:47,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:47,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:47,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:47,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:47,861 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-09-11 16:15:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:47,974 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-11 16:15:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:15:47,975 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:47,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:47,976 INFO L225 Difference]: With dead ends: 212 [2020-09-11 16:15:47,976 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 16:15:47,976 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 16:15:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 16:15:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-09-11 16:15:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-11 16:15:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-09-11 16:15:47,979 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-09-11 16:15:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:47,979 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-09-11 16:15:47,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-09-11 16:15:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:47,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:47,980 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:48,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:48,181 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:48,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 129 times [2020-09-11 16:15:48,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:48,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917811447] [2020-09-11 16:15:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:48,409 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 16:15:48,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917811447] [2020-09-11 16:15:48,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595531967] [2020-09-11 16:15:48,410 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 16:15:48,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:15:48,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:48,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:48,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:48,700 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 16:15:48,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:48,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:48,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650058776] [2020-09-11 16:15:48,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:48,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:48,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:48,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:48,701 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-09-11 16:15:48,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:48,889 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-09-11 16:15:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:15:48,890 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:48,890 INFO L225 Difference]: With dead ends: 217 [2020-09-11 16:15:48,890 INFO L226 Difference]: Without dead ends: 215 [2020-09-11 16:15:48,891 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 16:15:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-11 16:15:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-09-11 16:15:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-11 16:15:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-11 16:15:48,893 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-11 16:15:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:48,893 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-11 16:15:48,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-11 16:15:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:48,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:48,894 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:49,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:49,095 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:49,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 130 times [2020-09-11 16:15:49,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:49,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536746412] [2020-09-11 16:15:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:49,330 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 16:15:49,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536746412] [2020-09-11 16:15:49,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853815007] [2020-09-11 16:15:49,330 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 16:15:49,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:15:49,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:49,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:49,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:49,685 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 16:15:49,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:49,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:49,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242207280] [2020-09-11 16:15:49,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:49,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:49,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:49,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:49,687 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-11 16:15:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:49,996 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-11 16:15:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:15:49,997 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:49,998 INFO L225 Difference]: With dead ends: 227 [2020-09-11 16:15:49,998 INFO L226 Difference]: Without dead ends: 225 [2020-09-11 16:15:49,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:15:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-11 16:15:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-11 16:15:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-11 16:15:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-09-11 16:15:50,002 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-09-11 16:15:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:50,002 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-09-11 16:15:50,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-09-11 16:15:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:50,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:50,003 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:50,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:15:50,204 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:50,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:50,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 131 times [2020-09-11 16:15:50,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:50,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992574728] [2020-09-11 16:15:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:50,396 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 16:15:50,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992574728] [2020-09-11 16:15:50,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760001996] [2020-09-11 16:15:50,396 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 16:15:50,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:15:50,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:50,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:50,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:15:52,339 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 16:15:52,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:52,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:52,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095760358] [2020-09-11 16:15:52,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:52,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:52,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:52,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:15:52,340 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-09-11 16:15:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:15:52,733 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-11 16:15:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:15:52,734 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:15:52,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:15:52,735 INFO L225 Difference]: With dead ends: 225 [2020-09-11 16:15:52,735 INFO L226 Difference]: Without dead ends: 223 [2020-09-11 16:15:52,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:15:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-11 16:15:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 164. [2020-09-11 16:15:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-11 16:15:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-11 16:15:52,738 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-11 16:15:52,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:15:52,739 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-11 16:15:52,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:15:52,739 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-11 16:15:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:15:52,740 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:15:52,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:15:52,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-09-11 16:15:52,941 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:15:52,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:15:52,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 132 times [2020-09-11 16:15:52,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:15:52,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528222786] [2020-09-11 16:15:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:15:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:15:53,135 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 16:15:53,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528222786] [2020-09-11 16:15:53,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212371094] [2020-09-11 16:15:53,136 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 16:15:53,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:15:53,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:15:53,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:15:53,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [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 16:15:58,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:15:58,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:15:58,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738152818] [2020-09-11 16:15:58,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:15:58,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:15:58,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:15:58,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-09-11 16:15:58,299 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-11 16:16:02,529 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-11 16:16:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:02,801 INFO L93 Difference]: Finished difference Result 233 states and 545 transitions. [2020-09-11 16:16:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:02,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:16:02,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:02,802 INFO L225 Difference]: With dead ends: 233 [2020-09-11 16:16:02,802 INFO L226 Difference]: Without dead ends: 231 [2020-09-11 16:16:02,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=146, Invalid=359, Unknown=1, NotChecked=0, Total=506 [2020-09-11 16:16:02,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-11 16:16:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-09-11 16:16:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 16:16:02,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 16:16:02,806 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 16:16:02,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:02,806 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 16:16:02,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:16:02,806 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 16:16:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:02,807 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:02,807 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:03,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:03,009 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:03,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:03,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 133 times [2020-09-11 16:16:03,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:03,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438660657] [2020-09-11 16:16:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:03,182 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 16:16:03,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438660657] [2020-09-11 16:16:03,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801586286] [2020-09-11 16:16:03,183 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 16:16:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:03,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:03,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:03,513 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 16:16:03,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:03,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:16:03,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38738097] [2020-09-11 16:16:03,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:16:03,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:03,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:16:03,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:16:03,515 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-11 16:16:03,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:03,915 INFO L93 Difference]: Finished difference Result 225 states and 533 transitions. [2020-09-11 16:16:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:03,916 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:16:03,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:03,917 INFO L225 Difference]: With dead ends: 225 [2020-09-11 16:16:03,917 INFO L226 Difference]: Without dead ends: 223 [2020-09-11 16:16:03,917 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 16:16:03,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-11 16:16:03,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 160. [2020-09-11 16:16:03,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-11 16:16:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-09-11 16:16:03,919 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-09-11 16:16:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:03,920 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-09-11 16:16:03,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:16:03,920 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-09-11 16:16:03,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:03,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:03,920 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:04,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-11 16:16:04,121 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:04,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 134 times [2020-09-11 16:16:04,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:04,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943474900] [2020-09-11 16:16:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:04,289 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 16:16:04,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943474900] [2020-09-11 16:16:04,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378699646] [2020-09-11 16:16:04,290 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 16:16:04,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:04,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:04,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:04,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:04,585 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 16:16:04,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:04,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:16:04,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712521758] [2020-09-11 16:16:04,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:16:04,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:04,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:16:04,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:16:04,587 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-09-11 16:16:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:05,032 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-11 16:16:05,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:05,034 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 16:16:05,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:05,034 INFO L225 Difference]: With dead ends: 225 [2020-09-11 16:16:05,034 INFO L226 Difference]: Without dead ends: 223 [2020-09-11 16:16:05,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:16:05,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-11 16:16:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-09-11 16:16:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 16:16:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 16:16:05,037 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 16:16:05,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:05,037 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 16:16:05,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:16:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 16:16:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:05,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:05,038 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:05,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:05,239 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:05,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:05,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 135 times [2020-09-11 16:16:05,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:05,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814877464] [2020-09-11 16:16:05,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:05,406 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 16:16:05,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814877464] [2020-09-11 16:16:05,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471115218] [2020-09-11 16:16:05,407 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 16:16:05,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:16:05,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:05,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:05,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:05,690 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 16:16:05,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:05,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 16:16:05,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814937900] [2020-09-11 16:16:05,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:16:05,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:05,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:16:05,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:16:05,691 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. Received shutdown request... [2020-09-11 16:16:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:06,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-11 16:16:06,353 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 16:16:06,360 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 16:16:06,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 04:16:06 BasicIcfg [2020-09-11 16:16:06,360 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 16:16:06,362 INFO L168 Benchmark]: Toolchain (without parser) took 265630.33 ms. Allocated memory was 109.1 MB in the beginning and 181.4 MB in the end (delta: 72.4 MB). Free memory was 73.4 MB in the beginning and 94.7 MB in the end (delta: -21.2 MB). Peak memory consumption was 51.1 MB. Max. memory is 7.1 GB. [2020-09-11 16:16:06,362 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 109.1 MB. Free memory was 92.4 MB in the beginning and 92.3 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. [2020-09-11 16:16:06,363 INFO L168 Benchmark]: CACSL2BoogieTranslator took 739.85 ms. Allocated memory was 109.1 MB in the beginning and 168.8 MB in the end (delta: 59.8 MB). Free memory was 72.9 MB in the beginning and 135.7 MB in the end (delta: -62.8 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-09-11 16:16:06,363 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.46 ms. Allocated memory is still 168.8 MB. Free memory was 135.7 MB in the beginning and 133.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 16:16:06,363 INFO L168 Benchmark]: Boogie Preprocessor took 33.22 ms. Allocated memory is still 168.8 MB. Free memory was 133.7 MB in the beginning and 132.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-11 16:16:06,364 INFO L168 Benchmark]: RCFGBuilder took 476.64 ms. Allocated memory is still 168.8 MB. Free memory was 131.8 MB in the beginning and 111.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-09-11 16:16:06,364 INFO L168 Benchmark]: TraceAbstraction took 264313.00 ms. Allocated memory was 168.8 MB in the beginning and 181.4 MB in the end (delta: 12.6 MB). Free memory was 111.2 MB in the beginning and 94.7 MB in the end (delta: 16.5 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. [2020-09-11 16:16:06,366 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 109.1 MB. Free memory was 92.4 MB in the beginning and 92.3 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 739.85 ms. Allocated memory was 109.1 MB in the beginning and 168.8 MB in the end (delta: 59.8 MB). Free memory was 72.9 MB in the beginning and 135.7 MB in the end (delta: -62.8 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 57.46 ms. Allocated memory is still 168.8 MB. Free memory was 135.7 MB in the beginning and 133.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.22 ms. Allocated memory is still 168.8 MB. Free memory was 133.7 MB in the beginning and 132.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 476.64 ms. Allocated memory is still 168.8 MB. Free memory was 131.8 MB in the beginning and 111.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 264313.00 ms. Allocated memory was 168.8 MB in the beginning and 181.4 MB in the end (delta: 12.6 MB). Free memory was 111.2 MB in the beginning and 94.7 MB in the end (delta: 16.5 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 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 17 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (149 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 264.1s, OverallIterations: 169, TraceHistogramMax: 6, AutomataDifference: 157.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 2348 SDtfs, 16493 SDslu, 16540 SDs, 0 SdLazy, 12621 SolverSat, 3906 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 64.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4436 GetRequests, 799 SyntacticMatches, 144 SemanticMatches, 3493 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20580 ImplicationChecksByTransitivity, 138.9s 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: 0.6s AutomataMinimizationTime, 168 MinimizatonAttempts, 7562 StatesRemovedByMinimization, 168 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 3.2s SatisfiabilityAnalysisTime, 60.6s InterpolantComputationTime, 4100 NumberOfCodeBlocks, 4100 NumberOfCodeBlocksAsserted, 512 NumberOfCheckSat, 3769 ConstructedInterpolants, 7 QuantifiedInterpolants, 386807 SizeOfPredicates, 162 NumberOfNonLiveVariables, 13958 ConjunctsInSsa, 1566 ConjunctsInUnsatCore, 331 InterpolantComputations, 7 PerfectInterpolantSequences, 0/1550 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