/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/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 08:35:41,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 08:35:41,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 08:35:41,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 08:35:41,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 08:35:41,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 08:35:41,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 08:35:41,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 08:35:41,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 08:35:41,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 08:35:41,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 08:35:41,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 08:35:41,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 08:35:41,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 08:35:41,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 08:35:41,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 08:35:41,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 08:35:41,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 08:35:41,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 08:35:41,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 08:35:41,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 08:35:41,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 08:35:41,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 08:35:41,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 08:35:41,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 08:35:41,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 08:35:41,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 08:35:41,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 08:35:41,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 08:35:41,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 08:35:41,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 08:35:41,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 08:35:41,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 08:35:41,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 08:35:41,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 08:35:41,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 08:35:41,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 08:35:41,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 08:35:41,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 08:35:41,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 08:35:41,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 08:35:41,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2019-12-27 08:35:41,607 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 08:35:41,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 08:35:41,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 08:35:41,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 08:35:41,609 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 08:35:41,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 08:35:41,609 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 08:35:41,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 08:35:41,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 08:35:41,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 08:35:41,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 08:35:41,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 08:35:41,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 08:35:41,611 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 08:35:41,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 08:35:41,611 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 08:35:41,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 08:35:41,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 08:35:41,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 08:35:41,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 08:35:41,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 08:35:41,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 08:35:41,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 08:35:41,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 08:35:41,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 08:35:41,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 08:35:41,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 08:35:41,613 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2019-12-27 08:35:41,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 08:35:41,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 08:35:41,919 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 08:35:41,933 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 08:35:41,936 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 08:35:41,938 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 08:35:41,938 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 08:35:41,939 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-27 08:35:42,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51461d030/40013a54db29436c9e6bee5d535496cd/FLAG07f14cdf3 [2019-12-27 08:35:42,570 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 08:35:42,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-27 08:35:42,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51461d030/40013a54db29436c9e6bee5d535496cd/FLAG07f14cdf3 [2019-12-27 08:35:42,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51461d030/40013a54db29436c9e6bee5d535496cd [2019-12-27 08:35:42,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 08:35:42,880 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 08:35:42,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 08:35:42,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 08:35:42,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 08:35:42,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 08:35:42" (1/1) ... [2019-12-27 08:35:42,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a7ff5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 08:35:42, skipping insertion in model container [2019-12-27 08:35:42,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 08:35:42" (1/1) ... [2019-12-27 08:35:42,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 08:35:42,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 08:35:43,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 08:35:43,416 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 08:35:43,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 08:35:43,524 INFO L208 MainTranslator]: Completed translation [2019-12-27 08:35:43,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 08:35:43 WrapperNode [2019-12-27 08:35:43,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 08:35:43,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 08:35:43,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 08:35:43,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 08:35:43,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 08:35:43" (1/1) ... [2019-12-27 08:35:43,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 08:35:43" (1/1) ... [2019-12-27 08:35:43,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 08:35:43,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 08:35:43,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 08:35:43,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 08:35:43,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 08:35:43" (1/1) ... [2019-12-27 08:35:43,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 08:35:43" (1/1) ... [2019-12-27 08:35:43,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 08:35:43" (1/1) ... [2019-12-27 08:35:43,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 08:35:43" (1/1) ... [2019-12-27 08:35:43,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 08:35:43" (1/1) ... [2019-12-27 08:35:43,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 08:35:43" (1/1) ... [2019-12-27 08:35:43,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 08:35:43" (1/1) ... [2019-12-27 08:35:43,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 08:35:43,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 08:35:43,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 08:35:43,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 08:35:43,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 08:35:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 08:35:43,700 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 08:35:43,700 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 08:35:43,700 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 08:35:43,700 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 08:35:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 08:35:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 08:35:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 08:35:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 08:35:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 08:35:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 08:35:43,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 08:35:43,704 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 08:35:44,060 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 08:35:44,060 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 08:35:44,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 08:35:44 BoogieIcfgContainer [2019-12-27 08:35:44,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 08:35:44,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 08:35:44,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 08:35:44,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 08:35:44,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 08:35:42" (1/3) ... [2019-12-27 08:35:44,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22db07e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 08:35:44, skipping insertion in model container [2019-12-27 08:35:44,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 08:35:43" (2/3) ... [2019-12-27 08:35:44,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22db07e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 08:35:44, skipping insertion in model container [2019-12-27 08:35:44,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 08:35:44" (3/3) ... [2019-12-27 08:35:44,070 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2019-12-27 08:35:44,081 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 08:35:44,081 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 08:35:44,088 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 08:35:44,089 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 08:35:44,116 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,116 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,117 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,117 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,117 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,118 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,118 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,118 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,119 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,119 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,119 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,119 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,120 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,120 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,120 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,121 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,121 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,121 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,121 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,122 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,122 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,122 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,123 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,123 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,123 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,124 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,124 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,124 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,124 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,125 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,129 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,129 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,129 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,130 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,130 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,130 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,137 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,137 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,137 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,138 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,138 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,138 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 08:35:44,155 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 08:35:44,177 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 08:35:44,177 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 08:35:44,177 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 08:35:44,178 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-27 08:35:44,178 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 08:35:44,178 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 08:35:44,178 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 08:35:44,178 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 08:35:44,190 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 53 transitions [2019-12-27 08:35:44,274 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1244 states. [2019-12-27 08:35:44,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states. [2019-12-27 08:35:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 08:35:44,286 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:44,287 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:44,287 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:44,294 INFO L82 PathProgramCache]: Analyzing trace with hash 978645364, now seen corresponding path program 1 times [2019-12-27 08:35:44,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:44,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322241865] [2019-12-27 08:35:44,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:44,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322241865] [2019-12-27 08:35:44,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 08:35:44,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-27 08:35:44,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645294075] [2019-12-27 08:35:44,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 08:35:44,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:44,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 08:35:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-27 08:35:44,707 INFO L87 Difference]: Start difference. First operand 1244 states. Second operand 5 states. [2019-12-27 08:35:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:44,912 INFO L93 Difference]: Finished difference Result 2093 states and 6041 transitions. [2019-12-27 08:35:44,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 08:35:44,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-12-27 08:35:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:44,937 INFO L225 Difference]: With dead ends: 2093 [2019-12-27 08:35:44,938 INFO L226 Difference]: Without dead ends: 572 [2019-12-27 08:35:44,943 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-27 08:35:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-12-27 08:35:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 460. [2019-12-27 08:35:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2019-12-27 08:35:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1179 transitions. [2019-12-27 08:35:45,044 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1179 transitions. Word has length 20 [2019-12-27 08:35:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:45,045 INFO L462 AbstractCegarLoop]: Abstraction has 460 states and 1179 transitions. [2019-12-27 08:35:45,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 08:35:45,045 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1179 transitions. [2019-12-27 08:35:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-27 08:35:45,047 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:45,047 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:45,048 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:45,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:45,048 INFO L82 PathProgramCache]: Analyzing trace with hash 2103912560, now seen corresponding path program 1 times [2019-12-27 08:35:45,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:45,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038802982] [2019-12-27 08:35:45,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:45,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038802982] [2019-12-27 08:35:45,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 08:35:45,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-27 08:35:45,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152764581] [2019-12-27 08:35:45,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 08:35:45,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:45,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 08:35:45,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-27 08:35:45,258 INFO L87 Difference]: Start difference. First operand 460 states and 1179 transitions. Second operand 6 states. [2019-12-27 08:35:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:45,426 INFO L93 Difference]: Finished difference Result 908 states and 2257 transitions. [2019-12-27 08:35:45,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 08:35:45,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-12-27 08:35:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:45,433 INFO L225 Difference]: With dead ends: 908 [2019-12-27 08:35:45,433 INFO L226 Difference]: Without dead ends: 673 [2019-12-27 08:35:45,434 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-27 08:35:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-12-27 08:35:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 554. [2019-12-27 08:35:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-12-27 08:35:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1367 transitions. [2019-12-27 08:35:45,476 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1367 transitions. Word has length 24 [2019-12-27 08:35:45,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:45,476 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 1367 transitions. [2019-12-27 08:35:45,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 08:35:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1367 transitions. [2019-12-27 08:35:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 08:35:45,486 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:45,487 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:45,487 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:45,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:45,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1857069363, now seen corresponding path program 1 times [2019-12-27 08:35:45,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:45,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893595068] [2019-12-27 08:35:45,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:45,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893595068] [2019-12-27 08:35:45,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754147050] [2019-12-27 08:35:45,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:45,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 08:35:45,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:35:45,904 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:45,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:45,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:35:45,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-27 08:35:45,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540659020] [2019-12-27 08:35:45,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 08:35:45,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:45,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 08:35:45,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-27 08:35:45,925 INFO L87 Difference]: Start difference. First operand 554 states and 1367 transitions. Second operand 10 states. [2019-12-27 08:35:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:46,101 INFO L93 Difference]: Finished difference Result 1051 states and 2564 transitions. [2019-12-27 08:35:46,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 08:35:46,102 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-12-27 08:35:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:46,109 INFO L225 Difference]: With dead ends: 1051 [2019-12-27 08:35:46,109 INFO L226 Difference]: Without dead ends: 795 [2019-12-27 08:35:46,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 08:35:46,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2019-12-27 08:35:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 653. [2019-12-27 08:35:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2019-12-27 08:35:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1575 transitions. [2019-12-27 08:35:46,179 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1575 transitions. Word has length 28 [2019-12-27 08:35:46,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:46,182 INFO L462 AbstractCegarLoop]: Abstraction has 653 states and 1575 transitions. [2019-12-27 08:35:46,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 08:35:46,182 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1575 transitions. [2019-12-27 08:35:46,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 08:35:46,187 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:46,190 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:46,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:46,396 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:46,396 INFO L82 PathProgramCache]: Analyzing trace with hash 960102518, now seen corresponding path program 2 times [2019-12-27 08:35:46,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:46,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741067305] [2019-12-27 08:35:46,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:46,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741067305] [2019-12-27 08:35:46,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043835320] [2019-12-27 08:35:46,614 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:46,678 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 08:35:46,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:35:46,679 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 08:35:46,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:35:46,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:46,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:46,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:35:46,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-27 08:35:46,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039961930] [2019-12-27 08:35:46,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 08:35:46,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:46,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 08:35:46,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-27 08:35:46,808 INFO L87 Difference]: Start difference. First operand 653 states and 1575 transitions. Second operand 12 states. [2019-12-27 08:35:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:47,016 INFO L93 Difference]: Finished difference Result 1187 states and 2864 transitions. [2019-12-27 08:35:47,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 08:35:47,016 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2019-12-27 08:35:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:47,022 INFO L225 Difference]: With dead ends: 1187 [2019-12-27 08:35:47,023 INFO L226 Difference]: Without dead ends: 915 [2019-12-27 08:35:47,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 08:35:47,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2019-12-27 08:35:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 713. [2019-12-27 08:35:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2019-12-27 08:35:47,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1693 transitions. [2019-12-27 08:35:47,048 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1693 transitions. Word has length 32 [2019-12-27 08:35:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:47,048 INFO L462 AbstractCegarLoop]: Abstraction has 713 states and 1693 transitions. [2019-12-27 08:35:47,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 08:35:47,049 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1693 transitions. [2019-12-27 08:35:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 08:35:47,050 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:47,050 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:47,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:47,254 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:47,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:47,255 INFO L82 PathProgramCache]: Analyzing trace with hash 407146487, now seen corresponding path program 1 times [2019-12-27 08:35:47,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:47,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749746117] [2019-12-27 08:35:47,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:47,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749746117] [2019-12-27 08:35:47,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479600651] [2019-12-27 08:35:47,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:47,478 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 08:35:47,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:35:47,597 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:47,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:47,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:35:47,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-27 08:35:47,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361330049] [2019-12-27 08:35:47,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 08:35:47,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:47,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 08:35:47,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-27 08:35:47,604 INFO L87 Difference]: Start difference. First operand 713 states and 1693 transitions. Second operand 12 states. [2019-12-27 08:35:47,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:47,870 INFO L93 Difference]: Finished difference Result 1303 states and 3068 transitions. [2019-12-27 08:35:47,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 08:35:47,870 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2019-12-27 08:35:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:47,877 INFO L225 Difference]: With dead ends: 1303 [2019-12-27 08:35:47,877 INFO L226 Difference]: Without dead ends: 1096 [2019-12-27 08:35:47,878 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2019-12-27 08:35:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2019-12-27 08:35:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 812. [2019-12-27 08:35:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2019-12-27 08:35:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1908 transitions. [2019-12-27 08:35:47,903 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1908 transitions. Word has length 32 [2019-12-27 08:35:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:47,904 INFO L462 AbstractCegarLoop]: Abstraction has 812 states and 1908 transitions. [2019-12-27 08:35:47,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 08:35:47,905 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1908 transitions. [2019-12-27 08:35:47,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 08:35:47,907 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:47,907 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:48,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:48,111 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:48,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:48,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1263102534, now seen corresponding path program 2 times [2019-12-27 08:35:48,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:48,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697819944] [2019-12-27 08:35:48,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:48,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697819944] [2019-12-27 08:35:48,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103842388] [2019-12-27 08:35:48,258 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:48,327 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 08:35:48,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:35:48,328 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 08:35:48,331 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:35:48,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:48,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:48,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:48,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:35:48,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-27 08:35:48,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159815029] [2019-12-27 08:35:48,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 08:35:48,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:48,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 08:35:48,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-12-27 08:35:48,506 INFO L87 Difference]: Start difference. First operand 812 states and 1908 transitions. Second operand 14 states. [2019-12-27 08:35:48,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:48,973 INFO L93 Difference]: Finished difference Result 1488 states and 3466 transitions. [2019-12-27 08:35:48,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 08:35:48,973 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-27 08:35:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:48,980 INFO L225 Difference]: With dead ends: 1488 [2019-12-27 08:35:48,981 INFO L226 Difference]: Without dead ends: 1216 [2019-12-27 08:35:48,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2019-12-27 08:35:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2019-12-27 08:35:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 840. [2019-12-27 08:35:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2019-12-27 08:35:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1968 transitions. [2019-12-27 08:35:49,008 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1968 transitions. Word has length 36 [2019-12-27 08:35:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:49,008 INFO L462 AbstractCegarLoop]: Abstraction has 840 states and 1968 transitions. [2019-12-27 08:35:49,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 08:35:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1968 transitions. [2019-12-27 08:35:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 08:35:49,010 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:49,011 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:49,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:49,216 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:49,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1895585236, now seen corresponding path program 1 times [2019-12-27 08:35:49,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:49,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013323744] [2019-12-27 08:35:49,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:49,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013323744] [2019-12-27 08:35:49,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668163062] [2019-12-27 08:35:49,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:49,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 08:35:49,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:35:49,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:49,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:49,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:49,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:35:49,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-27 08:35:49,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048126509] [2019-12-27 08:35:49,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 08:35:49,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 08:35:49,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-27 08:35:49,584 INFO L87 Difference]: Start difference. First operand 840 states and 1968 transitions. Second operand 14 states. [2019-12-27 08:35:49,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:49,922 INFO L93 Difference]: Finished difference Result 1620 states and 3710 transitions. [2019-12-27 08:35:49,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 08:35:49,923 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-27 08:35:49,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:49,931 INFO L225 Difference]: With dead ends: 1620 [2019-12-27 08:35:49,931 INFO L226 Difference]: Without dead ends: 1413 [2019-12-27 08:35:49,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-12-27 08:35:49,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2019-12-27 08:35:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 905. [2019-12-27 08:35:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-12-27 08:35:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2110 transitions. [2019-12-27 08:35:49,982 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2110 transitions. Word has length 36 [2019-12-27 08:35:49,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:49,984 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 2110 transitions. [2019-12-27 08:35:49,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 08:35:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2110 transitions. [2019-12-27 08:35:49,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 08:35:49,985 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:49,986 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:50,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:50,197 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:50,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:50,197 INFO L82 PathProgramCache]: Analyzing trace with hash 99675450, now seen corresponding path program 3 times [2019-12-27 08:35:50,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:50,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443897248] [2019-12-27 08:35:50,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:50,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443897248] [2019-12-27 08:35:50,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78316283] [2019-12-27 08:35:50,329 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:50,375 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 08:35:50,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:35:50,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 08:35:50,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:35:50,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:50,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:50,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:35:50,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-27 08:35:50,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492945314] [2019-12-27 08:35:50,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 08:35:50,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:50,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 08:35:50,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-27 08:35:50,483 INFO L87 Difference]: Start difference. First operand 905 states and 2110 transitions. Second operand 14 states. [2019-12-27 08:35:50,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:50,938 INFO L93 Difference]: Finished difference Result 1713 states and 3928 transitions. [2019-12-27 08:35:50,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 08:35:50,939 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-27 08:35:50,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:50,946 INFO L225 Difference]: With dead ends: 1713 [2019-12-27 08:35:50,947 INFO L226 Difference]: Without dead ends: 1441 [2019-12-27 08:35:50,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2019-12-27 08:35:50,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2019-12-27 08:35:50,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 967. [2019-12-27 08:35:50,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 967 states. [2019-12-27 08:35:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2240 transitions. [2019-12-27 08:35:50,976 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2240 transitions. Word has length 36 [2019-12-27 08:35:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:50,977 INFO L462 AbstractCegarLoop]: Abstraction has 967 states and 2240 transitions. [2019-12-27 08:35:50,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 08:35:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2240 transitions. [2019-12-27 08:35:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 08:35:50,979 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:50,979 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:51,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:51,186 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:51,187 INFO L82 PathProgramCache]: Analyzing trace with hash 699135054, now seen corresponding path program 2 times [2019-12-27 08:35:51,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:51,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920768778] [2019-12-27 08:35:51,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:51,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920768778] [2019-12-27 08:35:51,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175416888] [2019-12-27 08:35:51,346 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:51,390 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 08:35:51,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:35:51,391 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 08:35:51,393 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:35:51,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:51,470 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:51,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:35:51,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-27 08:35:51,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684705856] [2019-12-27 08:35:51,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 08:35:51,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 08:35:51,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-27 08:35:51,476 INFO L87 Difference]: Start difference. First operand 967 states and 2240 transitions. Second operand 14 states. [2019-12-27 08:35:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:51,809 INFO L93 Difference]: Finished difference Result 1656 states and 3775 transitions. [2019-12-27 08:35:51,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 08:35:51,810 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-27 08:35:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:51,817 INFO L225 Difference]: With dead ends: 1656 [2019-12-27 08:35:51,818 INFO L226 Difference]: Without dead ends: 1491 [2019-12-27 08:35:51,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2019-12-27 08:35:51,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2019-12-27 08:35:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 967. [2019-12-27 08:35:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 967 states. [2019-12-27 08:35:51,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2240 transitions. [2019-12-27 08:35:51,847 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2240 transitions. Word has length 36 [2019-12-27 08:35:51,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:51,848 INFO L462 AbstractCegarLoop]: Abstraction has 967 states and 2240 transitions. [2019-12-27 08:35:51,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 08:35:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2240 transitions. [2019-12-27 08:35:51,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 08:35:51,850 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:51,851 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:52,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:52,055 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:52,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:52,056 INFO L82 PathProgramCache]: Analyzing trace with hash 425329149, now seen corresponding path program 4 times [2019-12-27 08:35:52,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:52,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143429811] [2019-12-27 08:35:52,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:52,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143429811] [2019-12-27 08:35:52,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994619636] [2019-12-27 08:35:52,214 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 08:35:52,262 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 08:35:52,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:35:52,263 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 08:35:52,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:35:52,794 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:52,795 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:52,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:52,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:35:52,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 08:35:52,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150146106] [2019-12-27 08:35:52,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 08:35:52,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:52,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 08:35:52,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=183, Unknown=1, NotChecked=0, Total=240 [2019-12-27 08:35:52,807 INFO L87 Difference]: Start difference. First operand 967 states and 2240 transitions. Second operand 16 states. [2019-12-27 08:35:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:54,366 INFO L93 Difference]: Finished difference Result 1707 states and 3867 transitions. [2019-12-27 08:35:54,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 08:35:54,366 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-27 08:35:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:54,374 INFO L225 Difference]: With dead ends: 1707 [2019-12-27 08:35:54,374 INFO L226 Difference]: Without dead ends: 1542 [2019-12-27 08:35:54,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=170, Invalid=584, Unknown=2, NotChecked=0, Total=756 [2019-12-27 08:35:54,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-12-27 08:35:54,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 967. [2019-12-27 08:35:54,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 967 states. [2019-12-27 08:35:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2240 transitions. [2019-12-27 08:35:54,400 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2240 transitions. Word has length 40 [2019-12-27 08:35:54,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:54,400 INFO L462 AbstractCegarLoop]: Abstraction has 967 states and 2240 transitions. [2019-12-27 08:35:54,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 08:35:54,400 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2240 transitions. [2019-12-27 08:35:54,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 08:35:54,402 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:54,402 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:54,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:54,606 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:54,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:54,607 INFO L82 PathProgramCache]: Analyzing trace with hash -710950377, now seen corresponding path program 3 times [2019-12-27 08:35:54,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:54,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989167364] [2019-12-27 08:35:54,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:54,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989167364] [2019-12-27 08:35:54,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555713553] [2019-12-27 08:35:54,742 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:54,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 08:35:54,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:35:54,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 08:35:54,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:35:54,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:54,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:54,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:54,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:35:54,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 08:35:54,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927554503] [2019-12-27 08:35:54,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 08:35:54,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:54,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 08:35:54,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2019-12-27 08:35:54,946 INFO L87 Difference]: Start difference. First operand 967 states and 2240 transitions. Second operand 16 states. [2019-12-27 08:35:55,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:55,859 INFO L93 Difference]: Finished difference Result 1835 states and 4140 transitions. [2019-12-27 08:35:55,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 08:35:55,860 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-27 08:35:55,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:55,868 INFO L225 Difference]: With dead ends: 1835 [2019-12-27 08:35:55,869 INFO L226 Difference]: Without dead ends: 1670 [2019-12-27 08:35:55,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2019-12-27 08:35:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2019-12-27 08:35:55,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1011. [2019-12-27 08:35:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1011 states. [2019-12-27 08:35:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 2347 transitions. [2019-12-27 08:35:55,896 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 2347 transitions. Word has length 40 [2019-12-27 08:35:55,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:55,896 INFO L462 AbstractCegarLoop]: Abstraction has 1011 states and 2347 transitions. [2019-12-27 08:35:55,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 08:35:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 2347 transitions. [2019-12-27 08:35:55,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 08:35:55,898 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:55,899 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:56,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:56,102 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:56,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:56,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1907400559, now seen corresponding path program 4 times [2019-12-27 08:35:56,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:56,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896925597] [2019-12-27 08:35:56,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:56,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896925597] [2019-12-27 08:35:56,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210183429] [2019-12-27 08:35:56,266 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 08:35:56,311 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 08:35:56,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:35:56,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 08:35:56,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:35:56,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:56,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:56,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:35:56,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 08:35:56,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165943373] [2019-12-27 08:35:56,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 08:35:56,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:56,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 08:35:56,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-12-27 08:35:56,428 INFO L87 Difference]: Start difference. First operand 1011 states and 2347 transitions. Second operand 16 states. [2019-12-27 08:35:56,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:56,883 INFO L93 Difference]: Finished difference Result 1967 states and 4400 transitions. [2019-12-27 08:35:56,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 08:35:56,883 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-27 08:35:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:56,892 INFO L225 Difference]: With dead ends: 1967 [2019-12-27 08:35:56,892 INFO L226 Difference]: Without dead ends: 1802 [2019-12-27 08:35:56,893 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2019-12-27 08:35:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2019-12-27 08:35:56,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 989. [2019-12-27 08:35:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 989 states. [2019-12-27 08:35:56,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2316 transitions. [2019-12-27 08:35:56,919 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2316 transitions. Word has length 40 [2019-12-27 08:35:56,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:56,919 INFO L462 AbstractCegarLoop]: Abstraction has 989 states and 2316 transitions. [2019-12-27 08:35:56,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 08:35:56,919 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2316 transitions. [2019-12-27 08:35:56,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 08:35:56,921 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:56,921 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:57,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:57,126 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:57,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:57,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2081625269, now seen corresponding path program 1 times [2019-12-27 08:35:57,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:57,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231147273] [2019-12-27 08:35:57,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:57,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231147273] [2019-12-27 08:35:57,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402696020] [2019-12-27 08:35:57,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:57,367 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 08:35:57,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:35:57,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:57,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:57,538 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:57,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:35:57,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 08:35:57,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347579728] [2019-12-27 08:35:57,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 08:35:57,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:57,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 08:35:57,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-27 08:35:57,554 INFO L87 Difference]: Start difference. First operand 989 states and 2316 transitions. Second operand 16 states. [2019-12-27 08:35:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:57,922 INFO L93 Difference]: Finished difference Result 1797 states and 4092 transitions. [2019-12-27 08:35:57,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 08:35:57,923 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-27 08:35:57,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:57,931 INFO L225 Difference]: With dead ends: 1797 [2019-12-27 08:35:57,931 INFO L226 Difference]: Without dead ends: 1590 [2019-12-27 08:35:57,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2019-12-27 08:35:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2019-12-27 08:35:57,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1071. [2019-12-27 08:35:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2019-12-27 08:35:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 2484 transitions. [2019-12-27 08:35:57,959 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 2484 transitions. Word has length 40 [2019-12-27 08:35:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:57,959 INFO L462 AbstractCegarLoop]: Abstraction has 1071 states and 2484 transitions. [2019-12-27 08:35:57,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 08:35:57,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 2484 transitions. [2019-12-27 08:35:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 08:35:57,961 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:57,961 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:58,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:58,168 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:58,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:58,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1295353087, now seen corresponding path program 5 times [2019-12-27 08:35:58,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:58,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349432878] [2019-12-27 08:35:58,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:35:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:58,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349432878] [2019-12-27 08:35:58,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780869169] [2019-12-27 08:35:58,311 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:58,366 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 08:35:58,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:35:58,367 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 08:35:58,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:35:58,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:58,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:58,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:35:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:35:58,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:35:58,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-27 08:35:58,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132916863] [2019-12-27 08:35:58,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 08:35:58,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:35:58,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 08:35:58,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-12-27 08:35:58,543 INFO L87 Difference]: Start difference. First operand 1071 states and 2484 transitions. Second operand 16 states. [2019-12-27 08:35:59,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:35:59,574 INFO L93 Difference]: Finished difference Result 1976 states and 4422 transitions. [2019-12-27 08:35:59,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 08:35:59,574 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-27 08:35:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:35:59,584 INFO L225 Difference]: With dead ends: 1976 [2019-12-27 08:35:59,584 INFO L226 Difference]: Without dead ends: 1811 [2019-12-27 08:35:59,585 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2019-12-27 08:35:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2019-12-27 08:35:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1105. [2019-12-27 08:35:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1105 states. [2019-12-27 08:35:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 2554 transitions. [2019-12-27 08:35:59,641 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 2554 transitions. Word has length 40 [2019-12-27 08:35:59,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:35:59,642 INFO L462 AbstractCegarLoop]: Abstraction has 1105 states and 2554 transitions. [2019-12-27 08:35:59,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 08:35:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 2554 transitions. [2019-12-27 08:35:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 08:35:59,644 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:35:59,644 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:35:59,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:35:59,850 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:35:59,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:35:59,851 INFO L82 PathProgramCache]: Analyzing trace with hash 643650778, now seen corresponding path program 6 times [2019-12-27 08:35:59,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:35:59,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186808429] [2019-12-27 08:35:59,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:35:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:00,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186808429] [2019-12-27 08:36:00,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370691094] [2019-12-27 08:36:00,013 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:00,061 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 08:36:00,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:00,062 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 08:36:00,063 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:00,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:00,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:00,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:00,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:00,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 08:36:00,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332880140] [2019-12-27 08:36:00,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 08:36:00,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:00,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 08:36:00,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-27 08:36:00,616 INFO L87 Difference]: Start difference. First operand 1105 states and 2554 transitions. Second operand 18 states. [2019-12-27 08:36:01,656 WARN L192 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2019-12-27 08:36:02,245 WARN L192 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2019-12-27 08:36:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:02,905 INFO L93 Difference]: Finished difference Result 2231 states and 4985 transitions. [2019-12-27 08:36:02,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 08:36:02,906 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-27 08:36:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:02,912 INFO L225 Difference]: With dead ends: 2231 [2019-12-27 08:36:02,912 INFO L226 Difference]: Without dead ends: 1959 [2019-12-27 08:36:02,913 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 08:36:02,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2019-12-27 08:36:02,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1154. [2019-12-27 08:36:02,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1154 states. [2019-12-27 08:36:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 2659 transitions. [2019-12-27 08:36:02,941 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 2659 transitions. Word has length 44 [2019-12-27 08:36:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:02,941 INFO L462 AbstractCegarLoop]: Abstraction has 1154 states and 2659 transitions. [2019-12-27 08:36:02,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 08:36:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 2659 transitions. [2019-12-27 08:36:02,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 08:36:02,944 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:02,944 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:03,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:03,148 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:03,148 INFO L82 PathProgramCache]: Analyzing trace with hash -885950476, now seen corresponding path program 7 times [2019-12-27 08:36:03,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:03,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799323627] [2019-12-27 08:36:03,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:03,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799323627] [2019-12-27 08:36:03,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007422222] [2019-12-27 08:36:03,300 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:03,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 08:36:03,362 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:03,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:03,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:03,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:03,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:03,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 08:36:03,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504900789] [2019-12-27 08:36:03,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 08:36:03,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:03,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 08:36:03,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-27 08:36:03,547 INFO L87 Difference]: Start difference. First operand 1154 states and 2659 transitions. Second operand 18 states. [2019-12-27 08:36:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:04,173 INFO L93 Difference]: Finished difference Result 2268 states and 5009 transitions. [2019-12-27 08:36:04,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 08:36:04,174 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-27 08:36:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:04,178 INFO L225 Difference]: With dead ends: 2268 [2019-12-27 08:36:04,178 INFO L226 Difference]: Without dead ends: 2103 [2019-12-27 08:36:04,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 08:36:04,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2019-12-27 08:36:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1202. [2019-12-27 08:36:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1202 states. [2019-12-27 08:36:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 2779 transitions. [2019-12-27 08:36:04,206 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 2779 transitions. Word has length 44 [2019-12-27 08:36:04,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:04,206 INFO L462 AbstractCegarLoop]: Abstraction has 1202 states and 2779 transitions. [2019-12-27 08:36:04,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 08:36:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 2779 transitions. [2019-12-27 08:36:04,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 08:36:04,208 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:04,208 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:04,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:04,412 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:04,413 INFO L82 PathProgramCache]: Analyzing trace with hash -552799404, now seen corresponding path program 8 times [2019-12-27 08:36:04,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:04,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147701449] [2019-12-27 08:36:04,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:04,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147701449] [2019-12-27 08:36:04,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378746112] [2019-12-27 08:36:04,563 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:04,609 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 08:36:04,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:04,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 08:36:04,612 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:05,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:05,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:05,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:05,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:05,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 08:36:05,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505885710] [2019-12-27 08:36:05,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 08:36:05,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:05,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 08:36:05,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=235, Unknown=1, NotChecked=0, Total=306 [2019-12-27 08:36:05,388 INFO L87 Difference]: Start difference. First operand 1202 states and 2779 transitions. Second operand 18 states. [2019-12-27 08:36:06,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:06,310 INFO L93 Difference]: Finished difference Result 2280 states and 5062 transitions. [2019-12-27 08:36:06,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 08:36:06,310 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-27 08:36:06,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:06,314 INFO L225 Difference]: With dead ends: 2280 [2019-12-27 08:36:06,315 INFO L226 Difference]: Without dead ends: 2115 [2019-12-27 08:36:06,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=238, Invalid=817, Unknown=1, NotChecked=0, Total=1056 [2019-12-27 08:36:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2019-12-27 08:36:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1202. [2019-12-27 08:36:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1202 states. [2019-12-27 08:36:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 2779 transitions. [2019-12-27 08:36:06,337 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 2779 transitions. Word has length 44 [2019-12-27 08:36:06,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:06,337 INFO L462 AbstractCegarLoop]: Abstraction has 1202 states and 2779 transitions. [2019-12-27 08:36:06,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 08:36:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 2779 transitions. [2019-12-27 08:36:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 08:36:06,339 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:06,339 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:06,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:06,541 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:06,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:06,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1772033396, now seen corresponding path program 9 times [2019-12-27 08:36:06,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:06,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012476339] [2019-12-27 08:36:06,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:06,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012476339] [2019-12-27 08:36:06,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89772472] [2019-12-27 08:36:06,703 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:06,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 08:36:06,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:06,769 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 08:36:06,770 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:06,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:06,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:06,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:06,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:06,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 08:36:06,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550255834] [2019-12-27 08:36:06,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 08:36:06,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:06,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 08:36:06,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-27 08:36:06,909 INFO L87 Difference]: Start difference. First operand 1202 states and 2779 transitions. Second operand 18 states. [2019-12-27 08:36:07,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:07,455 INFO L93 Difference]: Finished difference Result 2271 states and 5047 transitions. [2019-12-27 08:36:07,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 08:36:07,455 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-27 08:36:07,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:07,462 INFO L225 Difference]: With dead ends: 2271 [2019-12-27 08:36:07,462 INFO L226 Difference]: Without dead ends: 2106 [2019-12-27 08:36:07,463 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 08:36:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-12-27 08:36:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1184. [2019-12-27 08:36:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-12-27 08:36:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 2749 transitions. [2019-12-27 08:36:07,491 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 2749 transitions. Word has length 44 [2019-12-27 08:36:07,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:07,491 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 2749 transitions. [2019-12-27 08:36:07,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 08:36:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 2749 transitions. [2019-12-27 08:36:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 08:36:07,493 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:07,493 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:07,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:07,696 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:07,697 INFO L82 PathProgramCache]: Analyzing trace with hash -393873042, now seen corresponding path program 10 times [2019-12-27 08:36:07,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:07,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655406103] [2019-12-27 08:36:07,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:07,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655406103] [2019-12-27 08:36:07,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450268194] [2019-12-27 08:36:07,858 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:07,939 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 08:36:07,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:07,940 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 08:36:07,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:08,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:08,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:08,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:08,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:08,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 08:36:08,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827145726] [2019-12-27 08:36:08,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 08:36:08,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:08,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 08:36:08,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-27 08:36:08,580 INFO L87 Difference]: Start difference. First operand 1184 states and 2749 transitions. Second operand 18 states. [2019-12-27 08:36:09,704 WARN L192 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2019-12-27 08:36:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:11,102 INFO L93 Difference]: Finished difference Result 2392 states and 5309 transitions. [2019-12-27 08:36:11,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 08:36:11,103 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-27 08:36:11,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:11,108 INFO L225 Difference]: With dead ends: 2392 [2019-12-27 08:36:11,108 INFO L226 Difference]: Without dead ends: 2227 [2019-12-27 08:36:11,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=247, Invalid=873, Unknown=2, NotChecked=0, Total=1122 [2019-12-27 08:36:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2019-12-27 08:36:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 1200. [2019-12-27 08:36:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2019-12-27 08:36:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2789 transitions. [2019-12-27 08:36:11,138 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2789 transitions. Word has length 44 [2019-12-27 08:36:11,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:11,138 INFO L462 AbstractCegarLoop]: Abstraction has 1200 states and 2789 transitions. [2019-12-27 08:36:11,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 08:36:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2789 transitions. [2019-12-27 08:36:11,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 08:36:11,140 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:11,141 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:11,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:11,344 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1301891438, now seen corresponding path program 11 times [2019-12-27 08:36:11,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:11,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404599535] [2019-12-27 08:36:11,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:11,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404599535] [2019-12-27 08:36:11,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655512381] [2019-12-27 08:36:11,509 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:11,556 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 08:36:11,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:11,557 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 08:36:11,558 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:11,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:11,684 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:11,687 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:11,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:11,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 08:36:11,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569691524] [2019-12-27 08:36:11,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 08:36:11,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:11,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 08:36:11,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-12-27 08:36:11,696 INFO L87 Difference]: Start difference. First operand 1200 states and 2789 transitions. Second operand 18 states. [2019-12-27 08:36:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:12,508 INFO L93 Difference]: Finished difference Result 2670 states and 5930 transitions. [2019-12-27 08:36:12,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 08:36:12,515 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-27 08:36:12,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:12,519 INFO L225 Difference]: With dead ends: 2670 [2019-12-27 08:36:12,520 INFO L226 Difference]: Without dead ends: 2398 [2019-12-27 08:36:12,520 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 08:36:12,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2019-12-27 08:36:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1248. [2019-12-27 08:36:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1248 states. [2019-12-27 08:36:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 2902 transitions. [2019-12-27 08:36:12,551 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 2902 transitions. Word has length 44 [2019-12-27 08:36:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:12,551 INFO L462 AbstractCegarLoop]: Abstraction has 1248 states and 2902 transitions. [2019-12-27 08:36:12,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 08:36:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 2902 transitions. [2019-12-27 08:36:12,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 08:36:12,553 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:12,553 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:12,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:12,756 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2093415172, now seen corresponding path program 12 times [2019-12-27 08:36:12,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:12,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732503778] [2019-12-27 08:36:12,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:12,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732503778] [2019-12-27 08:36:12,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187560877] [2019-12-27 08:36:12,905 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:12,964 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 08:36:12,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:12,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 08:36:12,966 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:13,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:13,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:13,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:13,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:13,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-12-27 08:36:13,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960241899] [2019-12-27 08:36:13,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 08:36:13,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:13,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 08:36:13,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2019-12-27 08:36:13,122 INFO L87 Difference]: Start difference. First operand 1248 states and 2902 transitions. Second operand 19 states. [2019-12-27 08:36:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:13,641 INFO L93 Difference]: Finished difference Result 2365 states and 5257 transitions. [2019-12-27 08:36:13,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 08:36:13,641 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2019-12-27 08:36:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:13,646 INFO L225 Difference]: With dead ends: 2365 [2019-12-27 08:36:13,646 INFO L226 Difference]: Without dead ends: 2200 [2019-12-27 08:36:13,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 08:36:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2019-12-27 08:36:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1262. [2019-12-27 08:36:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1262 states. [2019-12-27 08:36:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 2952 transitions. [2019-12-27 08:36:13,676 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 2952 transitions. Word has length 44 [2019-12-27 08:36:13,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:13,676 INFO L462 AbstractCegarLoop]: Abstraction has 1262 states and 2952 transitions. [2019-12-27 08:36:13,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 08:36:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 2952 transitions. [2019-12-27 08:36:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 08:36:13,678 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:13,679 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:13,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:13,882 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:13,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:13,882 INFO L82 PathProgramCache]: Analyzing trace with hash -811669720, now seen corresponding path program 2 times [2019-12-27 08:36:13,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:13,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111247110] [2019-12-27 08:36:13,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:14,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111247110] [2019-12-27 08:36:14,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679191615] [2019-12-27 08:36:14,068 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:14,114 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 08:36:14,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:14,115 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 08:36:14,116 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:14,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:14,234 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:14,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:14,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:14,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 08:36:14,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654932591] [2019-12-27 08:36:14,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 08:36:14,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:14,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 08:36:14,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-12-27 08:36:14,242 INFO L87 Difference]: Start difference. First operand 1262 states and 2952 transitions. Second operand 18 states. [2019-12-27 08:36:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:14,688 INFO L93 Difference]: Finished difference Result 2190 states and 4954 transitions. [2019-12-27 08:36:14,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 08:36:14,688 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-27 08:36:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:14,691 INFO L225 Difference]: With dead ends: 2190 [2019-12-27 08:36:14,692 INFO L226 Difference]: Without dead ends: 1983 [2019-12-27 08:36:14,696 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2019-12-27 08:36:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2019-12-27 08:36:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1321. [2019-12-27 08:36:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1321 states. [2019-12-27 08:36:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 3058 transitions. [2019-12-27 08:36:14,737 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 3058 transitions. Word has length 44 [2019-12-27 08:36:14,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:14,737 INFO L462 AbstractCegarLoop]: Abstraction has 1321 states and 3058 transitions. [2019-12-27 08:36:14,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 08:36:14,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 3058 transitions. [2019-12-27 08:36:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 08:36:14,740 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:14,741 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:14,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:14,954 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:14,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:14,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1258163468, now seen corresponding path program 13 times [2019-12-27 08:36:14,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:14,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17384073] [2019-12-27 08:36:14,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:15,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17384073] [2019-12-27 08:36:15,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827542181] [2019-12-27 08:36:15,097 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:15,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 08:36:15,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:15,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:15,281 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:15,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:15,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:15,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 08:36:15,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072062689] [2019-12-27 08:36:15,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 08:36:15,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:15,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 08:36:15,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-12-27 08:36:15,290 INFO L87 Difference]: Start difference. First operand 1321 states and 3058 transitions. Second operand 18 states. [2019-12-27 08:36:15,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:15,896 INFO L93 Difference]: Finished difference Result 2365 states and 5271 transitions. [2019-12-27 08:36:15,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 08:36:15,896 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-27 08:36:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:15,899 INFO L225 Difference]: With dead ends: 2365 [2019-12-27 08:36:15,899 INFO L226 Difference]: Without dead ends: 2200 [2019-12-27 08:36:15,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 08:36:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2019-12-27 08:36:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1339. [2019-12-27 08:36:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2019-12-27 08:36:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 3088 transitions. [2019-12-27 08:36:15,924 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 3088 transitions. Word has length 44 [2019-12-27 08:36:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:15,924 INFO L462 AbstractCegarLoop]: Abstraction has 1339 states and 3088 transitions. [2019-12-27 08:36:15,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 08:36:15,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 3088 transitions. [2019-12-27 08:36:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 08:36:15,926 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:15,926 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:16,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:16,129 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:16,130 INFO L82 PathProgramCache]: Analyzing trace with hash -578663954, now seen corresponding path program 14 times [2019-12-27 08:36:16,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:16,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332171300] [2019-12-27 08:36:16,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:16,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332171300] [2019-12-27 08:36:16,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832018913] [2019-12-27 08:36:16,289 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:16,374 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 08:36:16,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:16,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 08:36:16,377 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:16,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:16,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:16,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:16,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:16,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 08:36:16,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82927723] [2019-12-27 08:36:16,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 08:36:16,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:16,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 08:36:16,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2019-12-27 08:36:16,766 INFO L87 Difference]: Start difference. First operand 1339 states and 3088 transitions. Second operand 18 states. [2019-12-27 08:36:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:18,703 INFO L93 Difference]: Finished difference Result 2582 states and 5693 transitions. [2019-12-27 08:36:18,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 08:36:18,704 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-27 08:36:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:18,707 INFO L225 Difference]: With dead ends: 2582 [2019-12-27 08:36:18,708 INFO L226 Difference]: Without dead ends: 2417 [2019-12-27 08:36:18,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 08:36:18,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2019-12-27 08:36:18,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1339. [2019-12-27 08:36:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2019-12-27 08:36:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 3088 transitions. [2019-12-27 08:36:18,727 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 3088 transitions. Word has length 44 [2019-12-27 08:36:18,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:18,727 INFO L462 AbstractCegarLoop]: Abstraction has 1339 states and 3088 transitions. [2019-12-27 08:36:18,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 08:36:18,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 3088 transitions. [2019-12-27 08:36:18,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 08:36:18,728 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:18,728 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:18,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:18,932 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:18,932 INFO L82 PathProgramCache]: Analyzing trace with hash -395470354, now seen corresponding path program 15 times [2019-12-27 08:36:18,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:18,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905067678] [2019-12-27 08:36:18,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:19,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905067678] [2019-12-27 08:36:19,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033574734] [2019-12-27 08:36:19,084 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:19,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 08:36:19,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:19,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 08:36:19,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:19,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:19,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:19,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:19,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:19,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 08:36:19,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154895577] [2019-12-27 08:36:19,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 08:36:19,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:19,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 08:36:19,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-27 08:36:19,329 INFO L87 Difference]: Start difference. First operand 1339 states and 3088 transitions. Second operand 18 states. [2019-12-27 08:36:19,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:19,951 INFO L93 Difference]: Finished difference Result 2715 states and 6008 transitions. [2019-12-27 08:36:19,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 08:36:19,951 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-27 08:36:19,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:19,955 INFO L225 Difference]: With dead ends: 2715 [2019-12-27 08:36:19,955 INFO L226 Difference]: Without dead ends: 2550 [2019-12-27 08:36:19,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=1045, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 08:36:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2019-12-27 08:36:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1339. [2019-12-27 08:36:19,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2019-12-27 08:36:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 3088 transitions. [2019-12-27 08:36:19,988 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 3088 transitions. Word has length 44 [2019-12-27 08:36:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:19,988 INFO L462 AbstractCegarLoop]: Abstraction has 1339 states and 3088 transitions. [2019-12-27 08:36:19,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 08:36:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 3088 transitions. [2019-12-27 08:36:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 08:36:19,990 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:19,990 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:20,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:20,193 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:20,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1733590504, now seen corresponding path program 16 times [2019-12-27 08:36:20,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:20,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623247191] [2019-12-27 08:36:20,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:20,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623247191] [2019-12-27 08:36:20,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806737714] [2019-12-27 08:36:20,336 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 08:36:20,381 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 08:36:20,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:20,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 08:36:20,383 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:20,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:20,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:20,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:20,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 08:36:20,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134538046] [2019-12-27 08:36:20,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 08:36:20,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 08:36:20,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-27 08:36:20,497 INFO L87 Difference]: Start difference. First operand 1339 states and 3088 transitions. Second operand 18 states. [2019-12-27 08:36:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:21,022 INFO L93 Difference]: Finished difference Result 2608 states and 5803 transitions. [2019-12-27 08:36:21,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 08:36:21,023 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-27 08:36:21,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:21,027 INFO L225 Difference]: With dead ends: 2608 [2019-12-27 08:36:21,027 INFO L226 Difference]: Without dead ends: 2443 [2019-12-27 08:36:21,028 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 08:36:21,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2019-12-27 08:36:21,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1307. [2019-12-27 08:36:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1307 states. [2019-12-27 08:36:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 3008 transitions. [2019-12-27 08:36:21,051 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 3008 transitions. Word has length 44 [2019-12-27 08:36:21,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:21,051 INFO L462 AbstractCegarLoop]: Abstraction has 1307 states and 3008 transitions. [2019-12-27 08:36:21,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 08:36:21,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 3008 transitions. [2019-12-27 08:36:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 08:36:21,053 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:21,053 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:21,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:21,256 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:21,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash 826388830, now seen corresponding path program 17 times [2019-12-27 08:36:21,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:21,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899084509] [2019-12-27 08:36:21,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:21,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899084509] [2019-12-27 08:36:21,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738797069] [2019-12-27 08:36:21,425 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:21,469 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 08:36:21,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:21,470 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 08:36:21,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:21,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:21,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:21,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:21,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:21,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-27 08:36:21,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432874034] [2019-12-27 08:36:21,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 08:36:21,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:21,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 08:36:21,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2019-12-27 08:36:21,601 INFO L87 Difference]: Start difference. First operand 1307 states and 3008 transitions. Second operand 18 states. [2019-12-27 08:36:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:22,297 INFO L93 Difference]: Finished difference Result 2483 states and 5546 transitions. [2019-12-27 08:36:22,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 08:36:22,298 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-27 08:36:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:22,300 INFO L225 Difference]: With dead ends: 2483 [2019-12-27 08:36:22,300 INFO L226 Difference]: Without dead ends: 2211 [2019-12-27 08:36:22,301 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 08:36:22,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2019-12-27 08:36:22,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1366. [2019-12-27 08:36:22,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1366 states. [2019-12-27 08:36:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 3126 transitions. [2019-12-27 08:36:22,325 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 3126 transitions. Word has length 44 [2019-12-27 08:36:22,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:22,325 INFO L462 AbstractCegarLoop]: Abstraction has 1366 states and 3126 transitions. [2019-12-27 08:36:22,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 08:36:22,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 3126 transitions. [2019-12-27 08:36:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:36:22,326 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:22,327 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:22,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:22,527 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:22,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:22,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1986924233, now seen corresponding path program 18 times [2019-12-27 08:36:22,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:22,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068695092] [2019-12-27 08:36:22,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:22,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068695092] [2019-12-27 08:36:22,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601817210] [2019-12-27 08:36:22,674 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:22,721 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 08:36:22,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:22,722 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:36:22,722 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:24,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:24,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:24,116 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:24,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:24,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:36:24,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892561840] [2019-12-27 08:36:24,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:36:24,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:24,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:36:24,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=300, Unknown=1, NotChecked=0, Total=380 [2019-12-27 08:36:24,125 INFO L87 Difference]: Start difference. First operand 1366 states and 3126 transitions. Second operand 20 states. [2019-12-27 08:36:25,029 WARN L192 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2019-12-27 08:36:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:25,313 INFO L93 Difference]: Finished difference Result 2765 states and 6071 transitions. [2019-12-27 08:36:25,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 08:36:25,314 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:36:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:25,317 INFO L225 Difference]: With dead ends: 2765 [2019-12-27 08:36:25,318 INFO L226 Difference]: Without dead ends: 2600 [2019-12-27 08:36:25,319 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=302, Invalid=1103, Unknown=1, NotChecked=0, Total=1406 [2019-12-27 08:36:25,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2019-12-27 08:36:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1414. [2019-12-27 08:36:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2019-12-27 08:36:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 3246 transitions. [2019-12-27 08:36:25,347 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 3246 transitions. Word has length 48 [2019-12-27 08:36:25,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:25,347 INFO L462 AbstractCegarLoop]: Abstraction has 1414 states and 3246 transitions. [2019-12-27 08:36:25,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:36:25,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 3246 transitions. [2019-12-27 08:36:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:36:25,349 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:25,350 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:25,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:25,553 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:25,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash 512133277, now seen corresponding path program 19 times [2019-12-27 08:36:25,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:25,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144689307] [2019-12-27 08:36:25,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:25,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144689307] [2019-12-27 08:36:25,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937196270] [2019-12-27 08:36:25,783 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:25,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:36:25,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:26,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:26,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:26,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:26,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:26,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:36:26,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728839043] [2019-12-27 08:36:26,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:36:26,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:26,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:36:26,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:36:26,284 INFO L87 Difference]: Start difference. First operand 1414 states and 3246 transitions. Second operand 20 states. [2019-12-27 08:36:27,536 WARN L192 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2019-12-27 08:36:28,832 WARN L192 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-27 08:36:29,349 WARN L192 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2019-12-27 08:36:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:31,691 INFO L93 Difference]: Finished difference Result 2870 states and 6293 transitions. [2019-12-27 08:36:31,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 08:36:31,691 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:36:31,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:31,696 INFO L225 Difference]: With dead ends: 2870 [2019-12-27 08:36:31,696 INFO L226 Difference]: Without dead ends: 2705 [2019-12-27 08:36:31,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=302, Invalid=1103, Unknown=1, NotChecked=0, Total=1406 [2019-12-27 08:36:31,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2019-12-27 08:36:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1426. [2019-12-27 08:36:31,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1426 states. [2019-12-27 08:36:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 3273 transitions. [2019-12-27 08:36:31,742 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 3273 transitions. Word has length 48 [2019-12-27 08:36:31,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:31,742 INFO L462 AbstractCegarLoop]: Abstraction has 1426 states and 3273 transitions. [2019-12-27 08:36:31,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:36:31,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 3273 transitions. [2019-12-27 08:36:31,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:36:31,745 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:31,745 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:31,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:31,949 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:31,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1653773161, now seen corresponding path program 20 times [2019-12-27 08:36:31,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:31,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634215434] [2019-12-27 08:36:31,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:32,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634215434] [2019-12-27 08:36:32,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315274480] [2019-12-27 08:36:32,256 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:32,315 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 08:36:32,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:32,316 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:36:32,317 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:34,625 WARN L192 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 08:36:34,995 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_89 Int)) (and (<= (div (+ (* v_~j~0_89 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ (* 2 v_~j~0_89) c_~i~0 1)) (<= c_~i~0 (+ (* 3 v_~j~0_89) 2)))) is different from true [2019-12-27 08:36:34,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:34,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:34,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:35,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:35,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:36:35,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938090684] [2019-12-27 08:36:35,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:36:35,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:35,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:36:35,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=4, NotChecked=34, Total=380 [2019-12-27 08:36:35,010 INFO L87 Difference]: Start difference. First operand 1426 states and 3273 transitions. Second operand 20 states. [2019-12-27 08:36:35,959 WARN L192 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-12-27 08:36:37,756 WARN L192 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2019-12-27 08:36:38,507 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-27 08:36:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:45,573 INFO L93 Difference]: Finished difference Result 2528 states and 5577 transitions. [2019-12-27 08:36:45,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 08:36:45,573 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:36:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:45,577 INFO L225 Difference]: With dead ends: 2528 [2019-12-27 08:36:45,577 INFO L226 Difference]: Without dead ends: 2421 [2019-12-27 08:36:45,578 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=310, Invalid=1017, Unknown=9, NotChecked=70, Total=1406 [2019-12-27 08:36:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2019-12-27 08:36:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1459. [2019-12-27 08:36:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1459 states. [2019-12-27 08:36:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 3356 transitions. [2019-12-27 08:36:45,597 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 3356 transitions. Word has length 48 [2019-12-27 08:36:45,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:45,598 INFO L462 AbstractCegarLoop]: Abstraction has 1459 states and 3356 transitions. [2019-12-27 08:36:45,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:36:45,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 3356 transitions. [2019-12-27 08:36:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:36:45,599 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:45,599 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:45,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:45,800 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:45,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:45,801 INFO L82 PathProgramCache]: Analyzing trace with hash 671059639, now seen corresponding path program 21 times [2019-12-27 08:36:45,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:45,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674011440] [2019-12-27 08:36:45,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:45,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674011440] [2019-12-27 08:36:45,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847800765] [2019-12-27 08:36:45,975 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:46,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 08:36:46,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:46,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:36:46,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:46,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:46,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:46,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:46,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:46,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:36:46,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930822417] [2019-12-27 08:36:46,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:36:46,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:46,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:36:46,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:36:46,276 INFO L87 Difference]: Start difference. First operand 1459 states and 3356 transitions. Second operand 20 states. [2019-12-27 08:36:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:47,121 INFO L93 Difference]: Finished difference Result 2899 states and 6356 transitions. [2019-12-27 08:36:47,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 08:36:47,121 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:36:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:47,125 INFO L225 Difference]: With dead ends: 2899 [2019-12-27 08:36:47,125 INFO L226 Difference]: Without dead ends: 2734 [2019-12-27 08:36:47,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=332, Invalid=1228, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 08:36:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2019-12-27 08:36:47,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 1475. [2019-12-27 08:36:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1475 states. [2019-12-27 08:36:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 3396 transitions. [2019-12-27 08:36:47,146 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 3396 transitions. Word has length 48 [2019-12-27 08:36:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:47,146 INFO L462 AbstractCegarLoop]: Abstraction has 1475 states and 3396 transitions. [2019-12-27 08:36:47,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:36:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 3396 transitions. [2019-12-27 08:36:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:36:47,149 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:47,149 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:47,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:47,352 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:47,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1494846799, now seen corresponding path program 22 times [2019-12-27 08:36:47,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:47,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105103243] [2019-12-27 08:36:47,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:47,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105103243] [2019-12-27 08:36:47,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066485996] [2019-12-27 08:36:47,502 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 08:36:47,547 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 08:36:47,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:47,548 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:36:47,549 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:47,785 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:47,785 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:47,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:47,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:47,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:36:47,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099176385] [2019-12-27 08:36:47,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:36:47,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:47,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:36:47,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:36:47,798 INFO L87 Difference]: Start difference. First operand 1475 states and 3396 transitions. Second operand 20 states. [2019-12-27 08:36:48,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:36:48,610 INFO L93 Difference]: Finished difference Result 3076 states and 6731 transitions. [2019-12-27 08:36:48,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 08:36:48,610 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:36:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:36:48,614 INFO L225 Difference]: With dead ends: 3076 [2019-12-27 08:36:48,614 INFO L226 Difference]: Without dead ends: 2911 [2019-12-27 08:36:48,615 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 08:36:48,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-12-27 08:36:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 1491. [2019-12-27 08:36:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1491 states. [2019-12-27 08:36:48,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3436 transitions. [2019-12-27 08:36:48,636 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3436 transitions. Word has length 48 [2019-12-27 08:36:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:36:48,637 INFO L462 AbstractCegarLoop]: Abstraction has 1491 states and 3436 transitions. [2019-12-27 08:36:48,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:36:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3436 transitions. [2019-12-27 08:36:48,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:36:48,638 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:36:48,638 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:36:48,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:48,839 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:36:48,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:36:48,840 INFO L82 PathProgramCache]: Analyzing trace with hash 200917681, now seen corresponding path program 23 times [2019-12-27 08:36:48,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:36:48,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609574847] [2019-12-27 08:36:48,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:36:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:36:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:49,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609574847] [2019-12-27 08:36:49,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133334495] [2019-12-27 08:36:49,013 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:36:49,061 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 08:36:49,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:36:49,062 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:36:49,063 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:36:49,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:49,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:49,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:36:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:36:49,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:36:49,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:36:49,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069137525] [2019-12-27 08:36:49,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:36:49,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:36:49,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:36:49,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:36:49,659 INFO L87 Difference]: Start difference. First operand 1491 states and 3436 transitions. Second operand 20 states. [2019-12-27 08:37:17,389 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-27 08:37:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:37:24,227 INFO L93 Difference]: Finished difference Result 2879 states and 6369 transitions. [2019-12-27 08:37:24,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 08:37:24,228 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:37:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:37:24,231 INFO L225 Difference]: With dead ends: 2879 [2019-12-27 08:37:24,231 INFO L226 Difference]: Without dead ends: 2714 [2019-12-27 08:37:24,232 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=325, Invalid=1152, Unknown=5, NotChecked=0, Total=1482 [2019-12-27 08:37:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2019-12-27 08:37:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1507. [2019-12-27 08:37:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1507 states. [2019-12-27 08:37:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 3476 transitions. [2019-12-27 08:37:24,252 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 3476 transitions. Word has length 48 [2019-12-27 08:37:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:37:24,253 INFO L462 AbstractCegarLoop]: Abstraction has 1507 states and 3476 transitions. [2019-12-27 08:37:24,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:37:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 3476 transitions. [2019-12-27 08:37:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:37:24,254 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:37:24,254 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:37:24,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:24,455 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:37:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:37:24,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1594992105, now seen corresponding path program 24 times [2019-12-27 08:37:24,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:37:24,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845282486] [2019-12-27 08:37:24,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:37:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:37:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:24,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845282486] [2019-12-27 08:37:24,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370709189] [2019-12-27 08:37:24,629 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:24,677 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 08:37:24,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:37:24,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:37:24,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:37:25,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:25,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:25,004 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:25,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:37:25,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:37:25,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363017236] [2019-12-27 08:37:25,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:37:25,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:37:25,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:37:25,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:37:25,016 INFO L87 Difference]: Start difference. First operand 1507 states and 3476 transitions. Second operand 20 states. [2019-12-27 08:37:26,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:37:26,702 INFO L93 Difference]: Finished difference Result 2891 states and 6382 transitions. [2019-12-27 08:37:26,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 08:37:26,702 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:37:26,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:37:26,706 INFO L225 Difference]: With dead ends: 2891 [2019-12-27 08:37:26,706 INFO L226 Difference]: Without dead ends: 2726 [2019-12-27 08:37:26,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 08:37:26,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2019-12-27 08:37:26,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1491. [2019-12-27 08:37:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1491 states. [2019-12-27 08:37:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3436 transitions. [2019-12-27 08:37:26,725 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3436 transitions. Word has length 48 [2019-12-27 08:37:26,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:37:26,725 INFO L462 AbstractCegarLoop]: Abstraction has 1491 states and 3436 transitions. [2019-12-27 08:37:26,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:37:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3436 transitions. [2019-12-27 08:37:26,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:37:26,727 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:37:26,727 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:37:26,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:26,928 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:37:26,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:37:26,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1912643477, now seen corresponding path program 25 times [2019-12-27 08:37:26,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:37:26,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460905830] [2019-12-27 08:37:26,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:37:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:37:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:27,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460905830] [2019-12-27 08:37:27,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631836967] [2019-12-27 08:37:27,129 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:37:27,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:37:27,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:37:27,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:27,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:27,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:27,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:37:27,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:37:27,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992442161] [2019-12-27 08:37:27,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:37:27,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:37:27,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:37:27,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:37:27,549 INFO L87 Difference]: Start difference. First operand 1491 states and 3436 transitions. Second operand 20 states. [2019-12-27 08:37:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:37:28,492 INFO L93 Difference]: Finished difference Result 2688 states and 5979 transitions. [2019-12-27 08:37:28,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 08:37:28,492 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:37:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:37:28,496 INFO L225 Difference]: With dead ends: 2688 [2019-12-27 08:37:28,496 INFO L226 Difference]: Without dead ends: 2481 [2019-12-27 08:37:28,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 08:37:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2019-12-27 08:37:28,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1528. [2019-12-27 08:37:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1528 states. [2019-12-27 08:37:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 3511 transitions. [2019-12-27 08:37:28,516 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 3511 transitions. Word has length 48 [2019-12-27 08:37:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:37:28,516 INFO L462 AbstractCegarLoop]: Abstraction has 1528 states and 3511 transitions. [2019-12-27 08:37:28,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:37:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 3511 transitions. [2019-12-27 08:37:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:37:28,518 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:37:28,518 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:37:28,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:28,721 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:37:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:37:28,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1935830071, now seen corresponding path program 26 times [2019-12-27 08:37:28,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:37:28,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499354455] [2019-12-27 08:37:28,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:37:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:37:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:28,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499354455] [2019-12-27 08:37:28,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699189405] [2019-12-27 08:37:28,923 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:28,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 08:37:28,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:37:28,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:37:28,973 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:37:29,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:29,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:29,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:29,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:37:29,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:37:29,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596858905] [2019-12-27 08:37:29,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:37:29,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:37:29,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:37:29,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:37:29,215 INFO L87 Difference]: Start difference. First operand 1528 states and 3511 transitions. Second operand 20 states. [2019-12-27 08:37:30,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:37:30,056 INFO L93 Difference]: Finished difference Result 3057 states and 6726 transitions. [2019-12-27 08:37:30,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 08:37:30,056 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:37:30,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:37:30,060 INFO L225 Difference]: With dead ends: 3057 [2019-12-27 08:37:30,061 INFO L226 Difference]: Without dead ends: 2892 [2019-12-27 08:37:30,062 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 08:37:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2019-12-27 08:37:30,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 1538. [2019-12-27 08:37:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2019-12-27 08:37:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3548 transitions. [2019-12-27 08:37:30,082 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3548 transitions. Word has length 48 [2019-12-27 08:37:30,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:37:30,082 INFO L462 AbstractCegarLoop]: Abstraction has 1538 states and 3548 transitions. [2019-12-27 08:37:30,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:37:30,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3548 transitions. [2019-12-27 08:37:30,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:37:30,084 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:37:30,084 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:37:30,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:30,285 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:37:30,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:37:30,286 INFO L82 PathProgramCache]: Analyzing trace with hash 116272075, now seen corresponding path program 27 times [2019-12-27 08:37:30,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:37:30,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983290821] [2019-12-27 08:37:30,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:37:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:37:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:30,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983290821] [2019-12-27 08:37:30,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9029881] [2019-12-27 08:37:30,479 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:30,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 08:37:30,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:37:30,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:37:30,527 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:37:31,976 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 08:37:34,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:34,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:34,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:34,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:37:34,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:37:34,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45952278] [2019-12-27 08:37:34,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:37:34,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:37:34,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:37:34,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=298, Unknown=1, NotChecked=0, Total=380 [2019-12-27 08:37:34,195 INFO L87 Difference]: Start difference. First operand 1538 states and 3548 transitions. Second operand 20 states. [2019-12-27 08:37:38,116 WARN L192 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-27 08:37:45,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:37:45,192 INFO L93 Difference]: Finished difference Result 3229 states and 7106 transitions. [2019-12-27 08:37:45,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 08:37:45,193 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:37:45,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:37:45,197 INFO L225 Difference]: With dead ends: 3229 [2019-12-27 08:37:45,197 INFO L226 Difference]: Without dead ends: 3064 [2019-12-27 08:37:45,198 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=376, Invalid=1342, Unknown=4, NotChecked=0, Total=1722 [2019-12-27 08:37:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2019-12-27 08:37:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 1558. [2019-12-27 08:37:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1558 states. [2019-12-27 08:37:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 3601 transitions. [2019-12-27 08:37:45,217 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 3601 transitions. Word has length 48 [2019-12-27 08:37:45,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:37:45,217 INFO L462 AbstractCegarLoop]: Abstraction has 1558 states and 3601 transitions. [2019-12-27 08:37:45,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:37:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 3601 transitions. [2019-12-27 08:37:45,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:37:45,219 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:37:45,219 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:37:45,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:45,420 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:37:45,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:37:45,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1679637711, now seen corresponding path program 28 times [2019-12-27 08:37:45,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:37:45,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226014772] [2019-12-27 08:37:45,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:37:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:37:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:45,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226014772] [2019-12-27 08:37:45,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873152086] [2019-12-27 08:37:45,633 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 08:37:45,694 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 08:37:45,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:37:45,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:37:45,697 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:37:47,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:47,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:47,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:47,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:37:47,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:37:47,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124217493] [2019-12-27 08:37:47,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:37:47,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:37:47,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:37:47,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2019-12-27 08:37:47,025 INFO L87 Difference]: Start difference. First operand 1558 states and 3601 transitions. Second operand 20 states. [2019-12-27 08:37:47,884 WARN L192 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2019-12-27 08:37:49,020 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-27 08:37:50,068 WARN L192 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-27 08:37:50,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:37:50,344 INFO L93 Difference]: Finished difference Result 3158 states and 6961 transitions. [2019-12-27 08:37:50,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 08:37:50,345 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:37:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:37:50,348 INFO L225 Difference]: With dead ends: 3158 [2019-12-27 08:37:50,349 INFO L226 Difference]: Without dead ends: 2993 [2019-12-27 08:37:50,349 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=346, Invalid=1292, Unknown=2, NotChecked=0, Total=1640 [2019-12-27 08:37:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2019-12-27 08:37:50,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 1590. [2019-12-27 08:37:50,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1590 states. [2019-12-27 08:37:50,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 3681 transitions. [2019-12-27 08:37:50,371 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 3681 transitions. Word has length 48 [2019-12-27 08:37:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:37:50,371 INFO L462 AbstractCegarLoop]: Abstraction has 1590 states and 3681 transitions. [2019-12-27 08:37:50,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:37:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 3681 transitions. [2019-12-27 08:37:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:37:50,373 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:37:50,373 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:37:50,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:50,574 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:37:50,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:37:50,574 INFO L82 PathProgramCache]: Analyzing trace with hash 454674699, now seen corresponding path program 29 times [2019-12-27 08:37:50,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:37:50,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003886572] [2019-12-27 08:37:50,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:37:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:37:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:50,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003886572] [2019-12-27 08:37:50,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909463287] [2019-12-27 08:37:50,754 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:50,802 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 08:37:50,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:37:50,803 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:37:50,804 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:37:51,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:51,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:51,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:51,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:37:51,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:37:51,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636687881] [2019-12-27 08:37:51,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:37:51,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:37:51,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:37:51,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:37:51,431 INFO L87 Difference]: Start difference. First operand 1590 states and 3681 transitions. Second operand 20 states. [2019-12-27 08:37:52,775 WARN L192 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-27 08:37:53,106 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2019-12-27 08:37:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:37:56,845 INFO L93 Difference]: Finished difference Result 3170 states and 6981 transitions. [2019-12-27 08:37:56,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 08:37:56,845 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:37:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:37:56,848 INFO L225 Difference]: With dead ends: 3170 [2019-12-27 08:37:56,849 INFO L226 Difference]: Without dead ends: 3005 [2019-12-27 08:37:56,849 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=379, Invalid=1340, Unknown=3, NotChecked=0, Total=1722 [2019-12-27 08:37:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2019-12-27 08:37:56,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 1558. [2019-12-27 08:37:56,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1558 states. [2019-12-27 08:37:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 3601 transitions. [2019-12-27 08:37:56,871 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 3601 transitions. Word has length 48 [2019-12-27 08:37:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:37:56,871 INFO L462 AbstractCegarLoop]: Abstraction has 1558 states and 3601 transitions. [2019-12-27 08:37:56,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:37:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 3601 transitions. [2019-12-27 08:37:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:37:56,873 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:37:56,873 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:37:57,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:57,075 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:37:57,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:37:57,076 INFO L82 PathProgramCache]: Analyzing trace with hash 299465675, now seen corresponding path program 30 times [2019-12-27 08:37:57,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:37:57,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801373846] [2019-12-27 08:37:57,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:37:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:37:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:57,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801373846] [2019-12-27 08:37:57,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296434742] [2019-12-27 08:37:57,277 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:57,324 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 08:37:57,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:37:57,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:37:57,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:37:57,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:57,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:57,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:57,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:37:57,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:37:57,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536746186] [2019-12-27 08:37:57,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:37:57,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:37:57,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:37:57,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:37:57,496 INFO L87 Difference]: Start difference. First operand 1558 states and 3601 transitions. Second operand 20 states. [2019-12-27 08:37:58,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:37:58,550 INFO L93 Difference]: Finished difference Result 3420 states and 7491 transitions. [2019-12-27 08:37:58,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 08:37:58,550 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:37:58,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:37:58,555 INFO L225 Difference]: With dead ends: 3420 [2019-12-27 08:37:58,555 INFO L226 Difference]: Without dead ends: 3255 [2019-12-27 08:37:58,556 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=467, Invalid=1695, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 08:37:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2019-12-27 08:37:58,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 1657. [2019-12-27 08:37:58,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1657 states. [2019-12-27 08:37:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 3853 transitions. [2019-12-27 08:37:58,591 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 3853 transitions. Word has length 48 [2019-12-27 08:37:58,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:37:58,591 INFO L462 AbstractCegarLoop]: Abstraction has 1657 states and 3853 transitions. [2019-12-27 08:37:58,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:37:58,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 3853 transitions. [2019-12-27 08:37:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:37:58,593 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:37:58,593 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:37:58,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:58,794 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:37:58,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:37:58,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1496444111, now seen corresponding path program 31 times [2019-12-27 08:37:58,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:37:58,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84001627] [2019-12-27 08:37:58,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:37:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:37:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:58,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84001627] [2019-12-27 08:37:58,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841183585] [2019-12-27 08:37:58,969 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:37:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:37:59,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:37:59,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:37:59,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:59,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:59,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:37:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:37:59,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:37:59,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:37:59,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800857058] [2019-12-27 08:37:59,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:37:59,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:37:59,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:37:59,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:37:59,207 INFO L87 Difference]: Start difference. First operand 1657 states and 3853 transitions. Second operand 20 states. [2019-12-27 08:38:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:00,409 INFO L93 Difference]: Finished difference Result 3539 states and 7814 transitions. [2019-12-27 08:38:00,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 08:38:00,410 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:38:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:00,415 INFO L225 Difference]: With dead ends: 3539 [2019-12-27 08:38:00,415 INFO L226 Difference]: Without dead ends: 3267 [2019-12-27 08:38:00,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=497, Invalid=1953, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 08:38:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2019-12-27 08:38:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 1661. [2019-12-27 08:38:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2019-12-27 08:38:00,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 3859 transitions. [2019-12-27 08:38:00,450 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 3859 transitions. Word has length 48 [2019-12-27 08:38:00,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:00,451 INFO L462 AbstractCegarLoop]: Abstraction has 1661 states and 3859 transitions. [2019-12-27 08:38:00,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:38:00,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 3859 transitions. [2019-12-27 08:38:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:38:00,453 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:00,453 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:00,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:00,657 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:00,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:00,657 INFO L82 PathProgramCache]: Analyzing trace with hash 632616747, now seen corresponding path program 32 times [2019-12-27 08:38:00,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:00,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729708907] [2019-12-27 08:38:00,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:00,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729708907] [2019-12-27 08:38:00,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391744485] [2019-12-27 08:38:00,893 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:00,943 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 08:38:00,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:38:00,944 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:38:00,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:01,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:01,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:01,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:01,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:38:01,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401948671] [2019-12-27 08:38:01,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:38:01,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:01,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:38:01,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:38:01,118 INFO L87 Difference]: Start difference. First operand 1661 states and 3859 transitions. Second operand 20 states. [2019-12-27 08:38:01,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:01,917 INFO L93 Difference]: Finished difference Result 3292 states and 7291 transitions. [2019-12-27 08:38:01,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 08:38:01,917 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:38:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:01,922 INFO L225 Difference]: With dead ends: 3292 [2019-12-27 08:38:01,922 INFO L226 Difference]: Without dead ends: 3127 [2019-12-27 08:38:01,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=385, Invalid=1337, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 08:38:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3127 states. [2019-12-27 08:38:01,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3127 to 1592. [2019-12-27 08:38:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1592 states. [2019-12-27 08:38:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 3683 transitions. [2019-12-27 08:38:01,945 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 3683 transitions. Word has length 48 [2019-12-27 08:38:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:01,945 INFO L462 AbstractCegarLoop]: Abstraction has 1592 states and 3683 transitions. [2019-12-27 08:38:01,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:38:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 3683 transitions. [2019-12-27 08:38:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:38:01,947 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:01,947 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:02,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:02,148 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:02,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:02,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1066108661, now seen corresponding path program 33 times [2019-12-27 08:38:02,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:02,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485219303] [2019-12-27 08:38:02,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:02,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485219303] [2019-12-27 08:38:02,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544702421] [2019-12-27 08:38:02,319 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:02,367 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 08:38:02,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:38:02,368 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:38:02,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:02,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:02,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:02,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:02,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:02,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:38:02,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122193334] [2019-12-27 08:38:02,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:38:02,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:02,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:38:02,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:38:02,580 INFO L87 Difference]: Start difference. First operand 1592 states and 3683 transitions. Second operand 20 states. [2019-12-27 08:38:03,502 WARN L192 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2019-12-27 08:38:04,196 WARN L192 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2019-12-27 08:38:04,830 WARN L192 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2019-12-27 08:38:05,378 WARN L192 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2019-12-27 08:38:05,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:05,971 INFO L93 Difference]: Finished difference Result 3407 states and 7435 transitions. [2019-12-27 08:38:05,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 08:38:05,971 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:38:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:05,975 INFO L225 Difference]: With dead ends: 3407 [2019-12-27 08:38:05,975 INFO L226 Difference]: Without dead ends: 3242 [2019-12-27 08:38:05,976 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=471, Invalid=1691, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 08:38:05,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2019-12-27 08:38:06,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 1588. [2019-12-27 08:38:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1588 states. [2019-12-27 08:38:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 3670 transitions. [2019-12-27 08:38:06,010 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 3670 transitions. Word has length 48 [2019-12-27 08:38:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:06,010 INFO L462 AbstractCegarLoop]: Abstraction has 1588 states and 3670 transitions. [2019-12-27 08:38:06,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:38:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 3670 transitions. [2019-12-27 08:38:06,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:38:06,013 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:06,013 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:06,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:06,217 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:06,217 INFO L82 PathProgramCache]: Analyzing trace with hash -274584927, now seen corresponding path program 34 times [2019-12-27 08:38:06,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:06,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393878422] [2019-12-27 08:38:06,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:06,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393878422] [2019-12-27 08:38:06,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644191847] [2019-12-27 08:38:06,395 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 08:38:06,444 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 08:38:06,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:38:06,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:38:06,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:06,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:06,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:06,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:06,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:06,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:38:06,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538238019] [2019-12-27 08:38:06,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:38:06,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:06,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:38:06,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:38:06,627 INFO L87 Difference]: Start difference. First operand 1588 states and 3670 transitions. Second operand 20 states. [2019-12-27 08:38:07,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:07,668 INFO L93 Difference]: Finished difference Result 3086 states and 6780 transitions. [2019-12-27 08:38:07,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 08:38:07,668 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:38:07,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:07,672 INFO L225 Difference]: With dead ends: 3086 [2019-12-27 08:38:07,672 INFO L226 Difference]: Without dead ends: 2921 [2019-12-27 08:38:07,673 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=431, Invalid=1549, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 08:38:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2019-12-27 08:38:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1619. [2019-12-27 08:38:07,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1619 states. [2019-12-27 08:38:07,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 3761 transitions. [2019-12-27 08:38:07,694 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 3761 transitions. Word has length 48 [2019-12-27 08:38:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:07,694 INFO L462 AbstractCegarLoop]: Abstraction has 1619 states and 3761 transitions. [2019-12-27 08:38:07,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:38:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 3761 transitions. [2019-12-27 08:38:07,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:38:07,696 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:07,696 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:07,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:07,897 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:07,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:07,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1561521155, now seen corresponding path program 5 times [2019-12-27 08:38:07,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:07,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659413248] [2019-12-27 08:38:07,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:08,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659413248] [2019-12-27 08:38:08,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167184767] [2019-12-27 08:38:08,146 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:08,220 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-27 08:38:08,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:38:08,222 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:38:08,223 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:08,492 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:08,492 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:08,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:08,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:38:08,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312439028] [2019-12-27 08:38:08,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:38:08,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:08,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:38:08,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:38:08,510 INFO L87 Difference]: Start difference. First operand 1619 states and 3761 transitions. Second operand 20 states. [2019-12-27 08:38:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:09,821 INFO L93 Difference]: Finished difference Result 3171 states and 7048 transitions. [2019-12-27 08:38:09,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 08:38:09,822 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:38:09,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:09,825 INFO L225 Difference]: With dead ends: 3171 [2019-12-27 08:38:09,826 INFO L226 Difference]: Without dead ends: 2841 [2019-12-27 08:38:09,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=466, Invalid=1790, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 08:38:09,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2019-12-27 08:38:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 1703. [2019-12-27 08:38:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1703 states. [2019-12-27 08:38:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 3915 transitions. [2019-12-27 08:38:09,877 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 3915 transitions. Word has length 48 [2019-12-27 08:38:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:09,877 INFO L462 AbstractCegarLoop]: Abstraction has 1703 states and 3915 transitions. [2019-12-27 08:38:09,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:38:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 3915 transitions. [2019-12-27 08:38:09,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:38:09,880 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:09,880 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:10,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:10,085 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:10,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1291469803, now seen corresponding path program 35 times [2019-12-27 08:38:10,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:10,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24483336] [2019-12-27 08:38:10,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:10,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24483336] [2019-12-27 08:38:10,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901426204] [2019-12-27 08:38:10,266 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:10,315 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 08:38:10,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:38:10,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:38:10,317 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:10,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:10,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:10,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:10,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:10,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:38:10,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762859395] [2019-12-27 08:38:10,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:38:10,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:10,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:38:10,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:38:10,592 INFO L87 Difference]: Start difference. First operand 1703 states and 3915 transitions. Second operand 20 states. [2019-12-27 08:38:11,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:11,296 INFO L93 Difference]: Finished difference Result 2917 states and 6471 transitions. [2019-12-27 08:38:11,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 08:38:11,297 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:38:11,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:11,300 INFO L225 Difference]: With dead ends: 2917 [2019-12-27 08:38:11,301 INFO L226 Difference]: Without dead ends: 2752 [2019-12-27 08:38:11,301 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 08:38:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2019-12-27 08:38:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1721. [2019-12-27 08:38:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1721 states. [2019-12-27 08:38:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 3945 transitions. [2019-12-27 08:38:11,322 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 3945 transitions. Word has length 48 [2019-12-27 08:38:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:11,322 INFO L462 AbstractCegarLoop]: Abstraction has 1721 states and 3945 transitions. [2019-12-27 08:38:11,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:38:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 3945 transitions. [2019-12-27 08:38:11,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:38:11,324 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:11,324 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:11,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:11,525 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:11,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:11,525 INFO L82 PathProgramCache]: Analyzing trace with hash -874436635, now seen corresponding path program 36 times [2019-12-27 08:38:11,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:11,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181973268] [2019-12-27 08:38:11,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:11,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181973268] [2019-12-27 08:38:11,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142822229] [2019-12-27 08:38:11,794 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:11,864 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 08:38:11,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:38:11,865 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:38:11,866 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:12,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:12,653 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:12,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:12,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:12,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:38:12,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045679925] [2019-12-27 08:38:12,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:38:12,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:12,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:38:12,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=300, Unknown=1, NotChecked=0, Total=380 [2019-12-27 08:38:12,664 INFO L87 Difference]: Start difference. First operand 1721 states and 3945 transitions. Second operand 20 states. [2019-12-27 08:38:15,484 WARN L192 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 08:38:15,627 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-27 08:38:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:15,712 INFO L93 Difference]: Finished difference Result 3134 states and 6886 transitions. [2019-12-27 08:38:15,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 08:38:15,713 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:38:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:15,716 INFO L225 Difference]: With dead ends: 3134 [2019-12-27 08:38:15,716 INFO L226 Difference]: Without dead ends: 2969 [2019-12-27 08:38:15,717 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=280, Invalid=1048, Unknown=4, NotChecked=0, Total=1332 [2019-12-27 08:38:15,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2969 states. [2019-12-27 08:38:15,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2969 to 1717. [2019-12-27 08:38:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1717 states. [2019-12-27 08:38:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 3932 transitions. [2019-12-27 08:38:15,744 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 3932 transitions. Word has length 48 [2019-12-27 08:38:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:15,744 INFO L462 AbstractCegarLoop]: Abstraction has 1717 states and 3932 transitions. [2019-12-27 08:38:15,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:38:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 3932 transitions. [2019-12-27 08:38:15,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:38:15,746 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:15,746 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:15,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:15,948 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:15,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:15,948 INFO L82 PathProgramCache]: Analyzing trace with hash 558027697, now seen corresponding path program 37 times [2019-12-27 08:38:15,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:15,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377446808] [2019-12-27 08:38:15,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:16,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377446808] [2019-12-27 08:38:16,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162659311] [2019-12-27 08:38:16,136 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:16,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:38:16,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:16,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:16,483 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:16,484 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:16,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:16,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:38:16,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717382811] [2019-12-27 08:38:16,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:38:16,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:16,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:38:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:38:16,496 INFO L87 Difference]: Start difference. First operand 1717 states and 3932 transitions. Second operand 20 states. [2019-12-27 08:38:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:18,275 INFO L93 Difference]: Finished difference Result 3420 states and 7430 transitions. [2019-12-27 08:38:18,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 08:38:18,275 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:38:18,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:18,280 INFO L225 Difference]: With dead ends: 3420 [2019-12-27 08:38:18,280 INFO L226 Difference]: Without dead ends: 3255 [2019-12-27 08:38:18,280 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=364, Invalid=1358, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 08:38:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2019-12-27 08:38:18,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 1701. [2019-12-27 08:38:18,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1701 states. [2019-12-27 08:38:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 3892 transitions. [2019-12-27 08:38:18,306 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 3892 transitions. Word has length 48 [2019-12-27 08:38:18,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:18,306 INFO L462 AbstractCegarLoop]: Abstraction has 1701 states and 3892 transitions. [2019-12-27 08:38:18,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:38:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 3892 transitions. [2019-12-27 08:38:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:38:18,308 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:18,308 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:18,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:18,509 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:18,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1181621435, now seen corresponding path program 38 times [2019-12-27 08:38:18,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:18,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403450535] [2019-12-27 08:38:18,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:18,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403450535] [2019-12-27 08:38:18,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753178306] [2019-12-27 08:38:18,697 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:18,745 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 08:38:18,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:38:18,746 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:38:18,747 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:18,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:18,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:18,992 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:19,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:19,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:38:19,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597045365] [2019-12-27 08:38:19,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:38:19,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:19,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:38:19,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:38:19,008 INFO L87 Difference]: Start difference. First operand 1701 states and 3892 transitions. Second operand 20 states. [2019-12-27 08:38:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:20,080 INFO L93 Difference]: Finished difference Result 3417 states and 7498 transitions. [2019-12-27 08:38:20,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 08:38:20,081 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:38:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:20,085 INFO L225 Difference]: With dead ends: 3417 [2019-12-27 08:38:20,086 INFO L226 Difference]: Without dead ends: 3252 [2019-12-27 08:38:20,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=396, Invalid=1410, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 08:38:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2019-12-27 08:38:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 1733. [2019-12-27 08:38:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2019-12-27 08:38:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 3972 transitions. [2019-12-27 08:38:20,126 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 3972 transitions. Word has length 48 [2019-12-27 08:38:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:20,126 INFO L462 AbstractCegarLoop]: Abstraction has 1733 states and 3972 transitions. [2019-12-27 08:38:20,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:38:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 3972 transitions. [2019-12-27 08:38:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:38:20,128 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:20,128 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:20,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:20,329 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1317436075, now seen corresponding path program 39 times [2019-12-27 08:38:20,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:20,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171018396] [2019-12-27 08:38:20,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:20,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171018396] [2019-12-27 08:38:20,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474148320] [2019-12-27 08:38:20,499 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:20,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 08:38:20,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:38:20,546 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:38:20,547 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:20,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:20,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:20,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:20,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:38:20,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936897144] [2019-12-27 08:38:20,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:38:20,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:38:20,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:38:20,712 INFO L87 Difference]: Start difference. First operand 1733 states and 3972 transitions. Second operand 20 states. [2019-12-27 08:38:21,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:21,537 INFO L93 Difference]: Finished difference Result 3541 states and 7798 transitions. [2019-12-27 08:38:21,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 08:38:21,537 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:38:21,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:21,542 INFO L225 Difference]: With dead ends: 3541 [2019-12-27 08:38:21,542 INFO L226 Difference]: Without dead ends: 3376 [2019-12-27 08:38:21,542 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 08:38:21,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2019-12-27 08:38:21,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 1701. [2019-12-27 08:38:21,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1701 states. [2019-12-27 08:38:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 3892 transitions. [2019-12-27 08:38:21,566 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 3892 transitions. Word has length 48 [2019-12-27 08:38:21,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:21,567 INFO L462 AbstractCegarLoop]: Abstraction has 1701 states and 3892 transitions. [2019-12-27 08:38:21,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:38:21,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 3892 transitions. [2019-12-27 08:38:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:38:21,569 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:21,569 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:21,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:21,770 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:21,771 INFO L82 PathProgramCache]: Analyzing trace with hash -843218811, now seen corresponding path program 40 times [2019-12-27 08:38:21,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:21,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36815622] [2019-12-27 08:38:21,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:22,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36815622] [2019-12-27 08:38:22,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414197677] [2019-12-27 08:38:22,065 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 08:38:22,137 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 08:38:22,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:38:22,139 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:38:22,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:22,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:22,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:22,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:22,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:22,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:38:22,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823977088] [2019-12-27 08:38:22,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:38:22,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:22,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:38:22,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:38:22,490 INFO L87 Difference]: Start difference. First operand 1701 states and 3892 transitions. Second operand 20 states. [2019-12-27 08:38:23,644 WARN L192 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-27 08:38:24,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:24,008 INFO L93 Difference]: Finished difference Result 3385 states and 7458 transitions. [2019-12-27 08:38:24,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 08:38:24,009 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:38:24,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:24,013 INFO L225 Difference]: With dead ends: 3385 [2019-12-27 08:38:24,013 INFO L226 Difference]: Without dead ends: 3220 [2019-12-27 08:38:24,013 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=424, Invalid=1468, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 08:38:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2019-12-27 08:38:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 1685. [2019-12-27 08:38:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1685 states. [2019-12-27 08:38:24,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 3852 transitions. [2019-12-27 08:38:24,036 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 3852 transitions. Word has length 48 [2019-12-27 08:38:24,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:24,036 INFO L462 AbstractCegarLoop]: Abstraction has 1685 states and 3852 transitions. [2019-12-27 08:38:24,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:38:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 3852 transitions. [2019-12-27 08:38:24,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 08:38:24,038 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:24,038 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:24,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:24,239 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:24,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:24,239 INFO L82 PathProgramCache]: Analyzing trace with hash -396328719, now seen corresponding path program 41 times [2019-12-27 08:38:24,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:24,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147757635] [2019-12-27 08:38:24,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:24,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147757635] [2019-12-27 08:38:24,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4755575] [2019-12-27 08:38:24,488 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:24,546 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 08:38:24,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:38:24,548 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 08:38:24,549 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:25,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:25,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:25,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:25,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:25,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-27 08:38:25,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002816709] [2019-12-27 08:38:25,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 08:38:25,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:25,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 08:38:25,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-27 08:38:25,205 INFO L87 Difference]: Start difference. First operand 1685 states and 3852 transitions. Second operand 20 states. [2019-12-27 08:38:26,412 WARN L192 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-27 08:38:27,429 WARN L192 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-27 08:38:28,645 WARN L192 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2019-12-27 08:38:29,384 WARN L192 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-27 08:38:30,438 WARN L192 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2019-12-27 08:38:30,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:30,714 INFO L93 Difference]: Finished difference Result 3517 states and 7645 transitions. [2019-12-27 08:38:30,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 08:38:30,715 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-27 08:38:30,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:30,720 INFO L225 Difference]: With dead ends: 3517 [2019-12-27 08:38:30,720 INFO L226 Difference]: Without dead ends: 3352 [2019-12-27 08:38:30,721 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=469, Invalid=1692, Unknown=1, NotChecked=0, Total=2162 [2019-12-27 08:38:30,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2019-12-27 08:38:30,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 1653. [2019-12-27 08:38:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1653 states. [2019-12-27 08:38:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 3772 transitions. [2019-12-27 08:38:30,744 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 3772 transitions. Word has length 48 [2019-12-27 08:38:30,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:30,744 INFO L462 AbstractCegarLoop]: Abstraction has 1653 states and 3772 transitions. [2019-12-27 08:38:30,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 08:38:30,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 3772 transitions. [2019-12-27 08:38:30,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-27 08:38:30,746 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:30,746 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:30,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:30,946 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:30,947 INFO L82 PathProgramCache]: Analyzing trace with hash -835250412, now seen corresponding path program 42 times [2019-12-27 08:38:30,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:30,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346785045] [2019-12-27 08:38:30,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:31,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346785045] [2019-12-27 08:38:31,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634456475] [2019-12-27 08:38:31,143 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:31,196 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 08:38:31,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:38:31,197 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 08:38:31,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:31,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:31,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:31,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:31,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:31,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-27 08:38:31,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119001350] [2019-12-27 08:38:31,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 08:38:31,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:31,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 08:38:31,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2019-12-27 08:38:31,518 INFO L87 Difference]: Start difference. First operand 1653 states and 3772 transitions. Second operand 22 states. [2019-12-27 08:38:32,107 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2019-12-27 08:38:33,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:33,475 INFO L93 Difference]: Finished difference Result 3563 states and 7768 transitions. [2019-12-27 08:38:33,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 08:38:33,476 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-27 08:38:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:33,479 INFO L225 Difference]: With dead ends: 3563 [2019-12-27 08:38:33,479 INFO L226 Difference]: Without dead ends: 3398 [2019-12-27 08:38:33,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=397, Invalid=1494, Unknown=1, NotChecked=0, Total=1892 [2019-12-27 08:38:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2019-12-27 08:38:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 1705. [2019-12-27 08:38:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1705 states. [2019-12-27 08:38:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 3905 transitions. [2019-12-27 08:38:33,504 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 3905 transitions. Word has length 52 [2019-12-27 08:38:33,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:33,504 INFO L462 AbstractCegarLoop]: Abstraction has 1705 states and 3905 transitions. [2019-12-27 08:38:33,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 08:38:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 3905 transitions. [2019-12-27 08:38:33,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-27 08:38:33,506 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:33,506 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:33,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:33,707 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:33,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:33,707 INFO L82 PathProgramCache]: Analyzing trace with hash -502099340, now seen corresponding path program 43 times [2019-12-27 08:38:33,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:33,708 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044773808] [2019-12-27 08:38:33,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:33,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044773808] [2019-12-27 08:38:33,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211092685] [2019-12-27 08:38:33,989 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:34,037 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 08:38:34,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:37,239 WARN L192 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 08:38:39,846 WARN L192 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-27 08:38:39,847 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:39,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:39,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:39,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:39,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-27 08:38:39,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095510412] [2019-12-27 08:38:39,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 08:38:39,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:39,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 08:38:39,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2019-12-27 08:38:39,863 INFO L87 Difference]: Start difference. First operand 1705 states and 3905 transitions. Second operand 22 states. [2019-12-27 08:38:43,169 WARN L192 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2019-12-27 08:38:43,594 WARN L192 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-27 08:38:45,023 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2019-12-27 08:38:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 08:38:46,615 INFO L93 Difference]: Finished difference Result 3723 states and 8048 transitions. [2019-12-27 08:38:46,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 08:38:46,615 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-27 08:38:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 08:38:46,620 INFO L225 Difference]: With dead ends: 3723 [2019-12-27 08:38:46,620 INFO L226 Difference]: Without dead ends: 3558 [2019-12-27 08:38:46,621 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=440, Invalid=1539, Unknown=1, NotChecked=0, Total=1980 [2019-12-27 08:38:46,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2019-12-27 08:38:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 1769. [2019-12-27 08:38:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2019-12-27 08:38:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 4065 transitions. [2019-12-27 08:38:46,646 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 4065 transitions. Word has length 52 [2019-12-27 08:38:46,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 08:38:46,646 INFO L462 AbstractCegarLoop]: Abstraction has 1769 states and 4065 transitions. [2019-12-27 08:38:46,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 08:38:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 4065 transitions. [2019-12-27 08:38:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-27 08:38:46,648 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 08:38:46,648 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 08:38:46,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:46,849 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 08:38:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 08:38:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1193665140, now seen corresponding path program 44 times [2019-12-27 08:38:46,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 08:38:46,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834143580] [2019-12-27 08:38:46,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 08:38:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 08:38:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:47,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834143580] [2019-12-27 08:38:47,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630196705] [2019-12-27 08:38:47,039 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 08:38:47,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 08:38:47,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 08:38:47,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 08:38:47,090 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 08:38:57,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:57,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:57,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-27 08:38:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 08:38:57,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 08:38:57,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-27 08:38:57,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780649092] [2019-12-27 08:38:57,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 08:38:57,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 08:38:57,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 08:38:57,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=362, Unknown=2, NotChecked=0, Total=462 [2019-12-27 08:38:57,220 INFO L87 Difference]: Start difference. First operand 1769 states and 4065 transitions. Second operand 22 states. [2019-12-27 08:38:57,805 WARN L192 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2019-12-27 08:39:05,772 WARN L192 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2019-12-27 08:39:10,014 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 08:39:11,391 WARN L192 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 39 DAG size of output: 24 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown