/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 12:01:55,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 12:01:55,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 12:01:55,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 12:01:55,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 12:01:55,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 12:01:55,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 12:01:55,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 12:01:55,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 12:01:55,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 12:01:55,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 12:01:55,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 12:01:55,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 12:01:55,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 12:01:55,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 12:01:55,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 12:01:55,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 12:01:55,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 12:01:55,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 12:01:55,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 12:01:55,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 12:01:55,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 12:01:55,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 12:01:55,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 12:01:55,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 12:01:55,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 12:01:55,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 12:01:55,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 12:01:55,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 12:01:55,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 12:01:55,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 12:01:55,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 12:01:55,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 12:01:55,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 12:01:55,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 12:01:55,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 12:01:55,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 12:01:55,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 12:01:55,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 12:01:55,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 12:01:55,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 12:01:55,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-11 12:01:55,739 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 12:01:55,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 12:01:55,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 12:01:55,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 12:01:55,741 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 12:01:55,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 12:01:55,742 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 12:01:55,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 12:01:55,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 12:01:55,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 12:01:55,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 12:01:55,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 12:01:55,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 12:01:55,743 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 12:01:55,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 12:01:55,744 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 12:01:55,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 12:01:55,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 12:01:55,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 12:01:55,745 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 12:01:55,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 12:01:55,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 12:01:55,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 12:01:55,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-11 12:01:55,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 12:01:55,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 12:01:55,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 12:01:55,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 12:01:55,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-11 12:01:55,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-11 12:01:56,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 12:01:56,875 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 12:01:56,882 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 12:01:56,884 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 12:01:56,884 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 12:01:56,886 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-09-11 12:01:56,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9fbc1bf32/d4fb2c54908a4343bd28e8ca2a227a0a/FLAGb0ffe1815 [2020-09-11 12:01:57,694 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 12:01:57,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-09-11 12:01:57,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9fbc1bf32/d4fb2c54908a4343bd28e8ca2a227a0a/FLAGb0ffe1815 [2020-09-11 12:01:57,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9fbc1bf32/d4fb2c54908a4343bd28e8ca2a227a0a [2020-09-11 12:01:57,943 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 12:01:57,948 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 12:01:57,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 12:01:57,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 12:01:57,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 12:01:57,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:01:57" (1/1) ... [2020-09-11 12:01:57,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23c504f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:57, skipping insertion in model container [2020-09-11 12:01:57,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:01:57" (1/1) ... [2020-09-11 12:01:57,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 12:01:58,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 12:01:58,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:01:58,537 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 12:01:58,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:01:58,743 INFO L208 MainTranslator]: Completed translation [2020-09-11 12:01:58,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58 WrapperNode [2020-09-11 12:01:58,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 12:01:58,746 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 12:01:58,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 12:01:58,746 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 12:01:58,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 12:01:58,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 12:01:58,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 12:01:58,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 12:01:58,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 12:01:58,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 12:01:58,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 12:01:58,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 12:01:58,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 12:01:58,948 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 12:01:58,949 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 12:01:58,949 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 12:01:58,949 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 12:01:58,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 12:01:58,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 12:01:58,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 12:01:58,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 12:01:58,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 12:01:58,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 12:01:58,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 12:01:58,953 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 12:01:59,333 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 12:01:59,334 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 12:01:59,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:01:59 BoogieIcfgContainer [2020-09-11 12:01:59,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 12:01:59,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 12:01:59,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 12:01:59,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 12:01:59,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 12:01:57" (1/3) ... [2020-09-11 12:01:59,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223d6ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:01:59, skipping insertion in model container [2020-09-11 12:01:59,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (2/3) ... [2020-09-11 12:01:59,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223d6ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:01:59, skipping insertion in model container [2020-09-11 12:01:59,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:01:59" (3/3) ... [2020-09-11 12:01:59,350 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-09-11 12:01:59,362 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 12:01:59,363 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-11 12:01:59,374 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 12:01:59,375 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 12:01:59,403 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,403 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,403 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,403 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,404 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,404 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,405 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,405 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,405 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,405 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,406 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,406 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,406 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,407 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,407 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,407 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,408 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,409 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,409 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,409 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,410 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,411 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,416 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,416 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,417 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,417 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,418 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,418 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,428 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,428 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,428 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,429 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,429 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,429 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,452 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 12:01:59,476 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 12:01:59,476 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 12:01:59,477 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-11 12:01:59,477 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 12:01:59,477 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 12:01:59,477 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 12:01:59,477 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 12:01:59,478 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 12:01:59,495 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-09-11 12:01:59,497 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-11 12:01:59,538 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-11 12:01:59,539 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:01:59,545 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-11 12:01:59,549 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-11 12:01:59,568 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-11 12:01:59,569 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:01:59,570 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-11 12:01:59,572 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-09-11 12:01:59,574 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-11 12:02:00,852 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-09-11 12:02:00,984 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-09-11 12:02:00,985 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-11 12:02:00,990 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 12:02:01,004 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 12:02:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 12:02:01,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 12:02:01,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:01,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 12:02:01,018 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:01,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-09-11 12:02:01,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:01,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644413725] [2020-09-11 12:02:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:01,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644413725] [2020-09-11 12:02:01,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:01,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 12:02:01,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285960419] [2020-09-11 12:02:01,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 12:02:01,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:01,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 12:02:01,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 12:02:01,357 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 12:02:01,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:01,436 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-09-11 12:02:01,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 12:02:01,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 12:02:01,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:01,456 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:02:01,456 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 12:02:01,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:02:01,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 12:02:01,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-11 12:02:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:02:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-09-11 12:02:01,513 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-09-11 12:02:01,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:01,514 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-09-11 12:02:01,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 12:02:01,514 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-09-11 12:02:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 12:02:01,515 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:01,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:01,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 12:02:01,516 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:01,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:01,517 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-09-11 12:02:01,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:01,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846847371] [2020-09-11 12:02:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:01,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846847371] [2020-09-11 12:02:01,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:01,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 12:02:01,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543708164] [2020-09-11 12:02:01,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 12:02:01,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:01,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 12:02:01,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:02:01,633 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-09-11 12:02:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:01,694 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-09-11 12:02:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:01,695 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 12:02:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:01,698 INFO L225 Difference]: With dead ends: 80 [2020-09-11 12:02:01,698 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 12:02:01,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:02:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 12:02:01,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-09-11 12:02:01,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 12:02:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-11 12:02:01,710 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-09-11 12:02:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:01,712 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-11 12:02:01,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 12:02:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-11 12:02:01,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 12:02:01,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:01,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:01,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 12:02:01,714 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:01,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:01,715 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-09-11 12:02:01,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:01,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128821878] [2020-09-11 12:02:01,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:01,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128821878] [2020-09-11 12:02:01,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:01,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 12:02:01,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896392764] [2020-09-11 12:02:01,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 12:02:01,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:01,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 12:02:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:02:01,826 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-09-11 12:02:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:01,855 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-09-11 12:02:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 12:02:01,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 12:02:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:01,857 INFO L225 Difference]: With dead ends: 73 [2020-09-11 12:02:01,857 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 12:02:01,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:02:01,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 12:02:01,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-11 12:02:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:02:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-09-11 12:02:01,876 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-09-11 12:02:01,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:01,877 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-09-11 12:02:01,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 12:02:01,877 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-09-11 12:02:01,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 12:02:01,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:01,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:01,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 12:02:01,881 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:01,882 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-09-11 12:02:01,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:01,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056168226] [2020-09-11 12:02:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:02,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056168226] [2020-09-11 12:02:02,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:02,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 12:02:02,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679370430] [2020-09-11 12:02:02,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 12:02:02,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:02,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 12:02:02,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:02:02,021 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-09-11 12:02:02,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:02,097 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-09-11 12:02:02,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:02,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 12:02:02,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:02,099 INFO L225 Difference]: With dead ends: 86 [2020-09-11 12:02:02,100 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 12:02:02,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:02:02,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 12:02:02,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-11 12:02:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:02:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-09-11 12:02:02,110 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-09-11 12:02:02,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:02,111 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-09-11 12:02:02,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 12:02:02,111 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-09-11 12:02:02,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 12:02:02,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:02,112 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:02,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 12:02:02,113 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:02,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:02,113 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-09-11 12:02:02,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:02,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213643708] [2020-09-11 12:02:02,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:02,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213643708] [2020-09-11 12:02:02,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106177909] [2020-09-11 12:02:02,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:02,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:02,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:02,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:02:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:02,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:02,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:02,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-09-11 12:02:02,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946846323] [2020-09-11 12:02:02,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:02:02,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:02,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:02:02,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:02:02,406 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-09-11 12:02:02,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:02,479 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-09-11 12:02:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:02,480 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-09-11 12:02:02,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:02,481 INFO L225 Difference]: With dead ends: 101 [2020-09-11 12:02:02,482 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 12:02:02,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:02,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 12:02:02,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-09-11 12:02:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 12:02:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-09-11 12:02:02,491 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-09-11 12:02:02,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:02,492 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-09-11 12:02:02,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:02:02,492 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-09-11 12:02:02,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 12:02:02,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:02,493 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:02,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:02,707 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:02,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:02,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-09-11 12:02:02,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:02,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937755972] [2020-09-11 12:02:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:02,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937755972] [2020-09-11 12:02:02,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347596761] [2020-09-11 12:02:02,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:02,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:02,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:02,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:02:02,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:02,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:02,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 12:02:02,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844098358] [2020-09-11 12:02:02,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:02:02,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:02:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:02,961 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-09-11 12:02:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:03,005 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-11 12:02:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-11 12:02:03,007 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 12:02:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:03,008 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:02:03,008 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 12:02:03,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:03,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 12:02:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-09-11 12:02:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:02:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-09-11 12:02:03,017 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-09-11 12:02:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:03,017 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-09-11 12:02:03,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:02:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-09-11 12:02:03,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 12:02:03,019 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:03,019 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:03,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:03,233 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:03,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:03,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-09-11 12:02:03,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:03,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447252948] [2020-09-11 12:02:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:03,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447252948] [2020-09-11 12:02:03,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218671025] [2020-09-11 12:02:03,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:03,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:03,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:03,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:02:03,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:03,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:03,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 12:02:03,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134213600] [2020-09-11 12:02:03,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:02:03,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:03,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:02:03,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:03,495 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-09-11 12:02:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:03,552 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-09-11 12:02:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:03,552 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 12:02:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:03,553 INFO L225 Difference]: With dead ends: 90 [2020-09-11 12:02:03,554 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 12:02:03,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:02:03,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 12:02:03,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-09-11 12:02:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 12:02:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-09-11 12:02:03,568 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-09-11 12:02:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:03,572 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-09-11 12:02:03,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:02:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-09-11 12:02:03,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 12:02:03,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:03,575 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:03,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:03,782 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:03,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:03,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-09-11 12:02:03,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:03,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958402114] [2020-09-11 12:02:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:03,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958402114] [2020-09-11 12:02:03,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178453344] [2020-09-11 12:02:03,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:03,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:03,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:03,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:02:03,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:03,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:03,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:03,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 12:02:03,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379689428] [2020-09-11 12:02:03,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:02:03,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:03,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:02:03,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:03,996 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-09-11 12:02:04,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:04,117 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-11 12:02:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:04,117 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 12:02:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:04,118 INFO L225 Difference]: With dead ends: 99 [2020-09-11 12:02:04,118 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 12:02:04,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:02:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 12:02:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-09-11 12:02:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 12:02:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-09-11 12:02:04,127 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-09-11 12:02:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:04,127 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-09-11 12:02:04,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:02:04,127 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-09-11 12:02:04,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:04,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:04,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:04,343 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,343 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-09-11 12:02:04,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916625838] [2020-09-11 12:02:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:04,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916625838] [2020-09-11 12:02:04,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:04,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:02:04,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505999992] [2020-09-11 12:02:04,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:02:04,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:04,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:02:04,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,425 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-09-11 12:02:04,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:04,459 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-09-11 12:02:04,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-11 12:02:04,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:02:04,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:04,461 INFO L225 Difference]: With dead ends: 92 [2020-09-11 12:02:04,461 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 12:02:04,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 12:02:04,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-09-11 12:02:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 12:02:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-09-11 12:02:04,468 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-09-11 12:02:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:04,469 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-09-11 12:02:04,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:02:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-09-11 12:02:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:04,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:04,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-11 12:02:04,471 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,471 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-09-11 12:02:04,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859481351] [2020-09-11 12:02:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:04,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859481351] [2020-09-11 12:02:04,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:04,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:02:04,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477735898] [2020-09-11 12:02:04,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:02:04,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:04,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:02:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,552 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-09-11 12:02:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:04,593 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-09-11 12:02:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:04,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:02:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:04,595 INFO L225 Difference]: With dead ends: 100 [2020-09-11 12:02:04,595 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:02:04,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:02:04,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:02:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-09-11 12:02:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 12:02:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-09-11 12:02:04,601 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-09-11 12:02:04,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:04,601 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-09-11 12:02:04,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:02:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-09-11 12:02:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:04,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:04,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-11 12:02:04,603 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,604 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-09-11 12:02:04,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835669722] [2020-09-11 12:02:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:04,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835669722] [2020-09-11 12:02:04,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:04,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:02:04,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636587433] [2020-09-11 12:02:04,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:02:04,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:04,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:02:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,672 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-09-11 12:02:04,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:04,766 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-11 12:02:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:04,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:02:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:04,768 INFO L225 Difference]: With dead ends: 105 [2020-09-11 12:02:04,768 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 12:02:04,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 12:02:04,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-11 12:02:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 12:02:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-09-11 12:02:04,774 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-09-11 12:02:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:04,774 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-09-11 12:02:04,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:02:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-09-11 12:02:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:04,775 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:04,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-11 12:02:04,776 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,776 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-09-11 12:02:04,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565750514] [2020-09-11 12:02:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:04,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565750514] [2020-09-11 12:02:04,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:04,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:02:04,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583263046] [2020-09-11 12:02:04,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:02:04,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:04,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:02:04,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,849 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-09-11 12:02:04,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:04,918 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-11 12:02:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:04,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:02:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:04,920 INFO L225 Difference]: With dead ends: 105 [2020-09-11 12:02:04,920 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 12:02:04,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 12:02:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-11 12:02:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 12:02:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-09-11 12:02:04,926 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-09-11 12:02:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:04,926 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-09-11 12:02:04,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:02:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-09-11 12:02:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:04,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:04,927 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-11 12:02:04,928 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,928 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-09-11 12:02:04,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821457667] [2020-09-11 12:02:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:05,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821457667] [2020-09-11 12:02:05,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455043353] [2020-09-11 12:02:05,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:05,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:05,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:05,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:05,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:05,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:05,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:05,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-11 12:02:05,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700093669] [2020-09-11 12:02:05,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:02:05,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:05,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:02:05,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:02:05,158 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-09-11 12:02:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:05,253 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-09-11 12:02:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:05,253 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-09-11 12:02:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:05,254 INFO L225 Difference]: With dead ends: 122 [2020-09-11 12:02:05,255 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 12:02:05,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:05,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 12:02:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-09-11 12:02:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 12:02:05,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-09-11 12:02:05,260 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-09-11 12:02:05,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:05,260 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-09-11 12:02:05,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:02:05,260 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-09-11 12:02:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:05,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:05,261 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:05,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-11 12:02:05,474 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:05,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-09-11 12:02:05,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:05,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332887698] [2020-09-11 12:02:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:05,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332887698] [2020-09-11 12:02:05,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685695963] [2020-09-11 12:02:05,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:05,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:05,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:05,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:05,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:05,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:05,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:05,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460287168] [2020-09-11 12:02:05,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:05,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:05,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:05,783 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-09-11 12:02:05,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:05,835 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-11 12:02:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:05,836 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 12:02:05,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:05,837 INFO L225 Difference]: With dead ends: 108 [2020-09-11 12:02:05,837 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 12:02:05,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:05,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 12:02:05,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-11 12:02:05,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-11 12:02:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-09-11 12:02:05,843 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-09-11 12:02:05,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:05,844 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-09-11 12:02:05,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:05,844 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-09-11 12:02:05,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:05,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:05,845 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:06,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:06,057 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:06,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:06,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-09-11 12:02:06,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:06,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312039775] [2020-09-11 12:02:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:06,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312039775] [2020-09-11 12:02:06,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516758543] [2020-09-11 12:02:06,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:06,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:06,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:06,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:06,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:06,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324950434] [2020-09-11 12:02:06,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:06,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:06,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:06,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:06,309 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-09-11 12:02:06,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:06,368 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-09-11 12:02:06,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:06,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 12:02:06,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:06,370 INFO L225 Difference]: With dead ends: 116 [2020-09-11 12:02:06,370 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 12:02:06,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:02:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 12:02:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-09-11 12:02:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-11 12:02:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-09-11 12:02:06,375 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-09-11 12:02:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:06,375 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-09-11 12:02:06,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-09-11 12:02:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:06,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:06,376 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:06,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 12:02:06,588 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:06,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-09-11 12:02:06,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:06,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852319050] [2020-09-11 12:02:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:06,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852319050] [2020-09-11 12:02:06,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764647811] [2020-09-11 12:02:06,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:06,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:06,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:06,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:06,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:06,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:06,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929169821] [2020-09-11 12:02:06,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:06,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:06,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:06,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:06,789 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-09-11 12:02:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:06,873 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-09-11 12:02:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:06,873 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 12:02:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:06,875 INFO L225 Difference]: With dead ends: 115 [2020-09-11 12:02:06,875 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 12:02:06,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 12:02:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-09-11 12:02:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-11 12:02:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-09-11 12:02:06,879 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-09-11 12:02:06,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:06,880 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-09-11 12:02:06,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:06,880 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-09-11 12:02:06,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:06,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:06,881 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:07,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 12:02:07,091 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:07,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:07,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-09-11 12:02:07,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:07,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132276745] [2020-09-11 12:02:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:07,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132276745] [2020-09-11 12:02:07,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268314930] [2020-09-11 12:02:07,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:07,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:07,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:07,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:07,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:07,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:07,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:07,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:07,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451510241] [2020-09-11 12:02:07,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:07,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:07,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:07,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:07,351 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-09-11 12:02:07,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:07,466 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-09-11 12:02:07,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:07,466 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 12:02:07,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:07,468 INFO L225 Difference]: With dead ends: 124 [2020-09-11 12:02:07,468 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 12:02:07,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:07,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 12:02:07,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-09-11 12:02:07,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-11 12:02:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-11 12:02:07,473 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-09-11 12:02:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:07,473 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-11 12:02:07,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:07,474 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-11 12:02:07,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:07,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:07,474 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:07,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 12:02:07,686 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:07,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:07,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-09-11 12:02:07,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:07,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050922056] [2020-09-11 12:02:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:07,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050922056] [2020-09-11 12:02:07,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319864788] [2020-09-11 12:02:07,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:07,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:07,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:07,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:07,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:07,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:07,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:07,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060594691] [2020-09-11 12:02:07,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:07,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:07,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:07,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:07,933 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-09-11 12:02:07,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:07,979 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-09-11 12:02:07,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:07,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:07,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:07,981 INFO L225 Difference]: With dead ends: 113 [2020-09-11 12:02:07,981 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 12:02:07,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:07,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 12:02:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-09-11 12:02:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-11 12:02:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-11 12:02:07,985 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-09-11 12:02:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:07,986 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-11 12:02:07,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-11 12:02:07,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:07,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:07,987 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:08,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 12:02:08,198 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:08,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-09-11 12:02:08,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:08,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885272857] [2020-09-11 12:02:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:08,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885272857] [2020-09-11 12:02:08,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564899900] [2020-09-11 12:02:08,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:08,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:08,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:08,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:08,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:08,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:08,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:08,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043664499] [2020-09-11 12:02:08,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:08,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:08,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:08,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:08,403 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-09-11 12:02:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:08,486 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-09-11 12:02:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:08,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:08,488 INFO L225 Difference]: With dead ends: 118 [2020-09-11 12:02:08,488 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 12:02:08,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 12:02:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-09-11 12:02:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-11 12:02:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-09-11 12:02:08,493 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-09-11 12:02:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:08,494 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-09-11 12:02:08,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-09-11 12:02:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:08,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:08,495 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:08,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:08,696 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:08,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-09-11 12:02:08,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:08,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161510686] [2020-09-11 12:02:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:08,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161510686] [2020-09-11 12:02:08,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459996511] [2020-09-11 12:02:08,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:08,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:08,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:08,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:08,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:08,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420711617] [2020-09-11 12:02:08,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:08,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:08,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:08,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:08,969 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-09-11 12:02:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:09,068 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-09-11 12:02:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:09,069 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:09,070 INFO L225 Difference]: With dead ends: 119 [2020-09-11 12:02:09,070 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 12:02:09,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 12:02:09,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-09-11 12:02:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-11 12:02:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-09-11 12:02:09,074 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-09-11 12:02:09,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:09,075 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-09-11 12:02:09,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:09,075 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-09-11 12:02:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:09,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:09,076 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:09,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:09,277 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:09,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:09,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-09-11 12:02:09,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:09,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362954514] [2020-09-11 12:02:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:09,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362954514] [2020-09-11 12:02:09,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851200464] [2020-09-11 12:02:09,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:09,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:09,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:09,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:09,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:09,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:09,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:09,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287025191] [2020-09-11 12:02:09,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:09,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:09,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:09,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:09,508 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-09-11 12:02:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:09,580 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-09-11 12:02:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:09,581 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:09,582 INFO L225 Difference]: With dead ends: 122 [2020-09-11 12:02:09,582 INFO L226 Difference]: Without dead ends: 120 [2020-09-11 12:02:09,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:02:09,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-11 12:02:09,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-09-11 12:02:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-11 12:02:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-09-11 12:02:09,589 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-09-11 12:02:09,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:09,589 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-09-11 12:02:09,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:09,590 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-09-11 12:02:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:09,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:09,590 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:09,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-11 12:02:09,800 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:09,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:09,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-09-11 12:02:09,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:09,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175014871] [2020-09-11 12:02:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:09,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175014871] [2020-09-11 12:02:09,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833067980] [2020-09-11 12:02:09,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:09,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:09,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:09,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:09,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:10,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:10,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:10,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996312089] [2020-09-11 12:02:10,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:10,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:10,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:10,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:10,012 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-09-11 12:02:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:10,107 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-09-11 12:02:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:10,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:10,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:10,109 INFO L225 Difference]: With dead ends: 123 [2020-09-11 12:02:10,109 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 12:02:10,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 12:02:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-11 12:02:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 12:02:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-09-11 12:02:10,117 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-09-11 12:02:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:10,117 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-09-11 12:02:10,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-09-11 12:02:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:10,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:10,118 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:10,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:10,329 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:10,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:10,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-09-11 12:02:10,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:10,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194378418] [2020-09-11 12:02:10,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:10,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194378418] [2020-09-11 12:02:10,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475254706] [2020-09-11 12:02:10,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:10,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:10,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:10,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:10,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:10,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:10,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:10,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829186430] [2020-09-11 12:02:10,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:10,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:10,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:10,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:10,614 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-09-11 12:02:10,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:10,702 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-11 12:02:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:10,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:10,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:10,704 INFO L225 Difference]: With dead ends: 123 [2020-09-11 12:02:10,704 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 12:02:10,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:10,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 12:02:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-09-11 12:02:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-11 12:02:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-09-11 12:02:10,711 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-09-11 12:02:10,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:10,711 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-09-11 12:02:10,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:10,712 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-09-11 12:02:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:10,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:10,715 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:10,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 12:02:10,923 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:10,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:10,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-09-11 12:02:10,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:10,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776506912] [2020-09-11 12:02:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:11,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776506912] [2020-09-11 12:02:11,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456093020] [2020-09-11 12:02:11,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:11,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:11,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:11,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:11,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:11,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:11,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:11,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:11,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609993993] [2020-09-11 12:02:11,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:11,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:11,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:11,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:11,208 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-09-11 12:02:11,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:11,387 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-11 12:02:11,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:11,388 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:11,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:11,389 INFO L225 Difference]: With dead ends: 133 [2020-09-11 12:02:11,390 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 12:02:11,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 12:02:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-09-11 12:02:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-11 12:02:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-09-11 12:02:11,395 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-09-11 12:02:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:11,395 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-09-11 12:02:11,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:11,396 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-09-11 12:02:11,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:11,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:11,397 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:11,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:11,609 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:11,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-09-11 12:02:11,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:11,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257286828] [2020-09-11 12:02:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:11,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257286828] [2020-09-11 12:02:11,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269672135] [2020-09-11 12:02:11,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:11,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:11,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:11,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:11,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:11,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:11,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299601451] [2020-09-11 12:02:11,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:11,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:11,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:11,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:11,851 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-09-11 12:02:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:12,006 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-11 12:02:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:12,006 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:12,007 INFO L225 Difference]: With dead ends: 127 [2020-09-11 12:02:12,007 INFO L226 Difference]: Without dead ends: 125 [2020-09-11 12:02:12,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-11 12:02:12,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-09-11 12:02:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-11 12:02:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-11 12:02:12,013 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-11 12:02:12,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:12,013 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-11 12:02:12,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:12,013 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-11 12:02:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:12,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:12,014 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:12,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-11 12:02:12,215 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:12,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-09-11 12:02:12,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:12,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654534130] [2020-09-11 12:02:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:12,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654534130] [2020-09-11 12:02:12,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881864204] [2020-09-11 12:02:12,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:12,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:12,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:12,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:12,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:12,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:12,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017957211] [2020-09-11 12:02:12,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:12,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:12,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:12,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:12,424 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-11 12:02:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:12,685 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-09-11 12:02:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:12,686 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:12,687 INFO L225 Difference]: With dead ends: 141 [2020-09-11 12:02:12,687 INFO L226 Difference]: Without dead ends: 136 [2020-09-11 12:02:12,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-11 12:02:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-09-11 12:02:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-11 12:02:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-11 12:02:12,692 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-11 12:02:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:12,692 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-11 12:02:12,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:12,692 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-11 12:02:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:12,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:12,693 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:12,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 12:02:12,894 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:12,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:12,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-09-11 12:02:12,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:12,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563927988] [2020-09-11 12:02:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:12,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563927988] [2020-09-11 12:02:12,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117037428] [2020-09-11 12:02:12,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:13,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:13,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:13,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:13,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:13,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:13,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:13,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:13,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256607743] [2020-09-11 12:02:13,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:13,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:13,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:13,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:13,117 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-11 12:02:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:13,315 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-11 12:02:13,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:13,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:13,317 INFO L225 Difference]: With dead ends: 136 [2020-09-11 12:02:13,317 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 12:02:13,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 12:02:13,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-11 12:02:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 12:02:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-09-11 12:02:13,324 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-09-11 12:02:13,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:13,327 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-09-11 12:02:13,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-09-11 12:02:13,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:13,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:13,328 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:13,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-11 12:02:13,542 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:13,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-09-11 12:02:13,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:13,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304610806] [2020-09-11 12:02:13,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:13,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304610806] [2020-09-11 12:02:13,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254805375] [2020-09-11 12:02:13,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:13,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:13,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:13,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:13,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:13,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:13,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:13,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456957268] [2020-09-11 12:02:13,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:13,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:13,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:13,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:13,736 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-09-11 12:02:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:13,857 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-09-11 12:02:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:13,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:13,859 INFO L225 Difference]: With dead ends: 130 [2020-09-11 12:02:13,860 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 12:02:13,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 12:02:13,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-09-11 12:02:13,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 12:02:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-11 12:02:13,864 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-11 12:02:13,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:13,864 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-11 12:02:13,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:13,864 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-11 12:02:13,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:13,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:13,865 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:14,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 12:02:14,075 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:14,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-09-11 12:02:14,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:14,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041947938] [2020-09-11 12:02:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:14,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041947938] [2020-09-11 12:02:14,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009973048] [2020-09-11 12:02:14,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:14,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:14,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:14,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:14,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:14,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:14,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335278559] [2020-09-11 12:02:14,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:14,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:14,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:14,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:14,305 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-11 12:02:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:14,453 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-09-11 12:02:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:14,453 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:14,454 INFO L225 Difference]: With dead ends: 131 [2020-09-11 12:02:14,455 INFO L226 Difference]: Without dead ends: 129 [2020-09-11 12:02:14,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:14,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-11 12:02:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-09-11 12:02:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 12:02:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-11 12:02:14,459 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-11 12:02:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:14,459 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-11 12:02:14,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-11 12:02:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:14,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:14,460 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:14,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 12:02:14,671 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:14,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:14,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-09-11 12:02:14,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:14,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060770957] [2020-09-11 12:02:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:14,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060770957] [2020-09-11 12:02:14,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878632949] [2020-09-11 12:02:14,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:14,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:14,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:14,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:14,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:14,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:14,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:14,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:14,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386233743] [2020-09-11 12:02:14,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:14,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:14,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:14,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:14,868 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-11 12:02:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:15,049 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-09-11 12:02:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:15,049 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:15,051 INFO L225 Difference]: With dead ends: 131 [2020-09-11 12:02:15,051 INFO L226 Difference]: Without dead ends: 126 [2020-09-11 12:02:15,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:15,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-11 12:02:15,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-09-11 12:02:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 12:02:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-11 12:02:15,055 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-11 12:02:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:15,055 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-11 12:02:15,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-11 12:02:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:15,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:15,056 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:15,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:15,267 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:15,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:15,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-09-11 12:02:15,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:15,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146219945] [2020-09-11 12:02:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:15,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146219945] [2020-09-11 12:02:15,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277229535] [2020-09-11 12:02:15,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:15,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:15,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:15,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:15,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:15,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:15,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:15,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:15,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162119402] [2020-09-11 12:02:15,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:15,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:15,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:15,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:15,483 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-11 12:02:15,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:15,744 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-09-11 12:02:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:15,745 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:15,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:15,747 INFO L225 Difference]: With dead ends: 145 [2020-09-11 12:02:15,747 INFO L226 Difference]: Without dead ends: 140 [2020-09-11 12:02:15,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-11 12:02:15,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-09-11 12:02:15,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 12:02:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-11 12:02:15,754 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-11 12:02:15,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:15,755 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-11 12:02:15,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:15,755 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-11 12:02:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:15,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:15,756 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:15,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-09-11 12:02:15,970 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:15,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-09-11 12:02:15,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:15,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676476976] [2020-09-11 12:02:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:16,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676476976] [2020-09-11 12:02:16,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645165282] [2020-09-11 12:02:16,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:16,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:16,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:16,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:16,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:16,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59139126] [2020-09-11 12:02:16,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:16,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:16,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:16,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:16,156 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-11 12:02:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:16,395 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-09-11 12:02:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:16,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:16,398 INFO L225 Difference]: With dead ends: 135 [2020-09-11 12:02:16,398 INFO L226 Difference]: Without dead ends: 130 [2020-09-11 12:02:16,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:16,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-11 12:02:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-09-11 12:02:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-11 12:02:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-09-11 12:02:16,402 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-09-11 12:02:16,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:16,402 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-09-11 12:02:16,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:16,402 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-09-11 12:02:16,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:16,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:16,403 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:16,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:16,613 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-09-11 12:02:16,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:16,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329193341] [2020-09-11 12:02:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:16,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329193341] [2020-09-11 12:02:16,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371738485] [2020-09-11 12:02:16,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:16,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:16,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:16,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:16,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:16,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:16,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:16,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-09-11 12:02:16,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784783263] [2020-09-11 12:02:16,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:02:16,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:16,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:02:16,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:16,867 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-09-11 12:02:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:17,011 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-09-11 12:02:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:17,012 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-09-11 12:02:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:17,013 INFO L225 Difference]: With dead ends: 143 [2020-09-11 12:02:17,013 INFO L226 Difference]: Without dead ends: 138 [2020-09-11 12:02:17,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:02:17,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-11 12:02:17,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-09-11 12:02:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-11 12:02:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-09-11 12:02:17,018 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-09-11 12:02:17,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:17,019 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-09-11 12:02:17,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:02:17,019 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-09-11 12:02:17,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:17,019 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:17,020 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:17,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-09-11 12:02:17,231 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-09-11 12:02:17,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:17,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315984982] [2020-09-11 12:02:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:17,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315984982] [2020-09-11 12:02:17,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734570149] [2020-09-11 12:02:17,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:17,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:17,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:17,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:17,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:17,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:17,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:17,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120401150] [2020-09-11 12:02:17,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:17,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:17,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:17,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:17,511 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-09-11 12:02:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:17,562 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-09-11 12:02:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:17,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:17,566 INFO L225 Difference]: With dead ends: 132 [2020-09-11 12:02:17,566 INFO L226 Difference]: Without dead ends: 129 [2020-09-11 12:02:17,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:17,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-11 12:02:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-09-11 12:02:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-11 12:02:17,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-11 12:02:17,570 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-11 12:02:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:17,570 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-11 12:02:17,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:17,571 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-11 12:02:17,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:17,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:17,571 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:17,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 12:02:17,781 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:17,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:17,782 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-09-11 12:02:17,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:17,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736312359] [2020-09-11 12:02:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:17,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736312359] [2020-09-11 12:02:17,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107042424] [2020-09-11 12:02:17,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:17,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:17,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:17,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:17,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:18,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:18,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:18,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579867015] [2020-09-11 12:02:18,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:18,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:18,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:18,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:18,070 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-11 12:02:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:18,142 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-09-11 12:02:18,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:18,143 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:18,144 INFO L225 Difference]: With dead ends: 143 [2020-09-11 12:02:18,145 INFO L226 Difference]: Without dead ends: 140 [2020-09-11 12:02:18,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-11 12:02:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-09-11 12:02:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-11 12:02:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-11 12:02:18,150 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-11 12:02:18,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:18,150 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-11 12:02:18,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-11 12:02:18,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:18,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:18,151 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:18,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-11 12:02:18,352 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-09-11 12:02:18,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:18,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369566982] [2020-09-11 12:02:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:18,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369566982] [2020-09-11 12:02:18,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218886266] [2020-09-11 12:02:18,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:18,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:02:18,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:18,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:18,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:18,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:18,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:18,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506678332] [2020-09-11 12:02:18,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:18,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:18,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:18,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:18,628 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-11 12:02:18,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:18,726 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-09-11 12:02:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:18,726 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:18,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:18,728 INFO L225 Difference]: With dead ends: 142 [2020-09-11 12:02:18,728 INFO L226 Difference]: Without dead ends: 139 [2020-09-11 12:02:18,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-11 12:02:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-09-11 12:02:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-11 12:02:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-09-11 12:02:18,733 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-09-11 12:02:18,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:18,733 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-09-11 12:02:18,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-09-11 12:02:18,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:18,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:18,734 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:18,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 12:02:18,944 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:18,945 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-09-11 12:02:18,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:18,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055088915] [2020-09-11 12:02:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:19,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055088915] [2020-09-11 12:02:19,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328294927] [2020-09-11 12:02:19,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:19,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:19,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:19,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:19,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:19,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047818576] [2020-09-11 12:02:19,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:19,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:19,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:19,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:19,234 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-09-11 12:02:19,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:19,345 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-09-11 12:02:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:19,346 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:19,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:19,347 INFO L225 Difference]: With dead ends: 141 [2020-09-11 12:02:19,347 INFO L226 Difference]: Without dead ends: 138 [2020-09-11 12:02:19,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-11 12:02:19,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-09-11 12:02:19,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-11 12:02:19,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-09-11 12:02:19,351 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-09-11 12:02:19,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:19,352 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-09-11 12:02:19,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:19,352 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-09-11 12:02:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:19,352 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:19,353 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:19,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-11 12:02:19,554 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:19,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:19,554 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-09-11 12:02:19,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:19,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724235755] [2020-09-11 12:02:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:19,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724235755] [2020-09-11 12:02:19,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122442475] [2020-09-11 12:02:19,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:19,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:19,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:19,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:19,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:19,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:19,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:19,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:19,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335053800] [2020-09-11 12:02:19,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:19,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:19,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:19,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:19,805 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-09-11 12:02:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:19,974 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-11 12:02:19,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:19,975 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:19,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:19,976 INFO L225 Difference]: With dead ends: 150 [2020-09-11 12:02:19,977 INFO L226 Difference]: Without dead ends: 144 [2020-09-11 12:02:19,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:02:19,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-11 12:02:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-09-11 12:02:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-11 12:02:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-09-11 12:02:19,981 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-09-11 12:02:19,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:19,981 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-09-11 12:02:19,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-09-11 12:02:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:19,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:19,982 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:20,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:20,192 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:20,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:20,193 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-09-11 12:02:20,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:20,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077676396] [2020-09-11 12:02:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:20,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077676396] [2020-09-11 12:02:20,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539827013] [2020-09-11 12:02:20,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:20,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:20,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:20,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:20,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:20,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:20,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:20,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170784349] [2020-09-11 12:02:20,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:20,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:20,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:20,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:20,484 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-09-11 12:02:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:20,548 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-09-11 12:02:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:20,548 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:20,550 INFO L225 Difference]: With dead ends: 138 [2020-09-11 12:02:20,550 INFO L226 Difference]: Without dead ends: 136 [2020-09-11 12:02:20,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:20,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-11 12:02:20,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-09-11 12:02:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-11 12:02:20,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-09-11 12:02:20,553 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-09-11 12:02:20,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:20,553 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-09-11 12:02:20,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:20,553 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-09-11 12:02:20,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:20,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:20,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:20,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 12:02:20,755 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:20,755 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-09-11 12:02:20,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:20,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294988654] [2020-09-11 12:02:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:20,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294988654] [2020-09-11 12:02:20,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310917949] [2020-09-11 12:02:20,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:20,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:20,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:20,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:20,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:21,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:21,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:21,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363410477] [2020-09-11 12:02:21,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:21,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:21,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:21,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:21,008 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-09-11 12:02:21,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:21,129 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-11 12:02:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:21,132 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:21,134 INFO L225 Difference]: With dead ends: 145 [2020-09-11 12:02:21,134 INFO L226 Difference]: Without dead ends: 143 [2020-09-11 12:02:21,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-11 12:02:21,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-11 12:02:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-11 12:02:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-09-11 12:02:21,137 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-09-11 12:02:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:21,137 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-09-11 12:02:21,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:21,138 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-09-11 12:02:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:21,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:21,138 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:21,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 12:02:21,339 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:21,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:21,340 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-09-11 12:02:21,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:21,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524279444] [2020-09-11 12:02:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:21,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524279444] [2020-09-11 12:02:21,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554948520] [2020-09-11 12:02:21,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:21,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:21,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:21,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:21,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:21,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:21,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:21,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619727495] [2020-09-11 12:02:21,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:21,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:21,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:21,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:21,594 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-09-11 12:02:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:21,750 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-11 12:02:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:21,751 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:21,752 INFO L225 Difference]: With dead ends: 150 [2020-09-11 12:02:21,752 INFO L226 Difference]: Without dead ends: 148 [2020-09-11 12:02:21,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-11 12:02:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-09-11 12:02:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-11 12:02:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-09-11 12:02:21,757 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-09-11 12:02:21,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:21,757 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-09-11 12:02:21,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-09-11 12:02:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:21,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:21,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:21,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:21,965 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:21,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:21,965 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-09-11 12:02:21,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:21,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323940462] [2020-09-11 12:02:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:22,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323940462] [2020-09-11 12:02:22,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128232418] [2020-09-11 12:02:22,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:22,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:22,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:22,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:22,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:22,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:22,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:22,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62418736] [2020-09-11 12:02:22,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:22,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:22,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:22,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:22,266 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-09-11 12:02:22,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:22,407 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-09-11 12:02:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:22,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:22,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:22,409 INFO L225 Difference]: With dead ends: 148 [2020-09-11 12:02:22,409 INFO L226 Difference]: Without dead ends: 146 [2020-09-11 12:02:22,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-11 12:02:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-09-11 12:02:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-11 12:02:22,414 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-11 12:02:22,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:22,415 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-11 12:02:22,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:22,415 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-11 12:02:22,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:22,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:22,416 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:22,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-11 12:02:22,627 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:22,628 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-09-11 12:02:22,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:22,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138021896] [2020-09-11 12:02:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:22,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138021896] [2020-09-11 12:02:22,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656908151] [2020-09-11 12:02:22,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:22,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:22,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:22,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:22,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:22,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:22,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:22,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293036665] [2020-09-11 12:02:22,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:22,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:22,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:22,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:22,911 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-11 12:02:23,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:23,066 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-09-11 12:02:23,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:23,067 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:23,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:23,069 INFO L225 Difference]: With dead ends: 149 [2020-09-11 12:02:23,069 INFO L226 Difference]: Without dead ends: 147 [2020-09-11 12:02:23,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-11 12:02:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-09-11 12:02:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-09-11 12:02:23,073 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-09-11 12:02:23,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:23,074 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-09-11 12:02:23,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:23,074 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-09-11 12:02:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:23,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:23,075 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:23,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:23,279 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:23,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:23,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-09-11 12:02:23,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:23,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432390948] [2020-09-11 12:02:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:23,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432390948] [2020-09-11 12:02:23,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217389276] [2020-09-11 12:02:23,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:23,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:23,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:23,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:23,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:23,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628567564] [2020-09-11 12:02:23,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:23,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:23,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:23,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:23,567 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-09-11 12:02:23,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:23,641 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-09-11 12:02:23,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:23,642 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:23,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:23,643 INFO L225 Difference]: With dead ends: 152 [2020-09-11 12:02:23,644 INFO L226 Difference]: Without dead ends: 150 [2020-09-11 12:02:23,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:23,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-11 12:02:23,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-09-11 12:02:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 12:02:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-09-11 12:02:23,647 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-09-11 12:02:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:23,647 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-09-11 12:02:23,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-09-11 12:02:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:23,648 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:23,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:23,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 12:02:23,849 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-09-11 12:02:23,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:23,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807678298] [2020-09-11 12:02:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:23,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807678298] [2020-09-11 12:02:23,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527721380] [2020-09-11 12:02:23,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:23,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:23,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:23,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:23,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:24,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:24,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:24,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386448197] [2020-09-11 12:02:24,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:24,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:24,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:24,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:24,135 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-09-11 12:02:24,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:24,307 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-09-11 12:02:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:24,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:24,309 INFO L225 Difference]: With dead ends: 153 [2020-09-11 12:02:24,310 INFO L226 Difference]: Without dead ends: 151 [2020-09-11 12:02:24,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:24,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-11 12:02:24,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-09-11 12:02:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:24,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-11 12:02:24,314 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-11 12:02:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:24,315 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-11 12:02:24,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-11 12:02:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:24,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:24,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:24,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-09-11 12:02:24,526 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:24,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:24,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-09-11 12:02:24,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:24,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956299842] [2020-09-11 12:02:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:24,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956299842] [2020-09-11 12:02:24,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968572192] [2020-09-11 12:02:24,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:24,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:24,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:24,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:24,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:24,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:24,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116532679] [2020-09-11 12:02:24,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:24,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:24,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:24,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:24,793 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-11 12:02:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:24,988 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-11 12:02:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:24,989 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:24,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:24,991 INFO L225 Difference]: With dead ends: 156 [2020-09-11 12:02:24,991 INFO L226 Difference]: Without dead ends: 154 [2020-09-11 12:02:24,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:02:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-11 12:02:24,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-09-11 12:02:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-11 12:02:24,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-09-11 12:02:24,996 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-09-11 12:02:24,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:24,996 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-09-11 12:02:24,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:24,996 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-09-11 12:02:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:24,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:24,997 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:25,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-11 12:02:25,206 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:25,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-09-11 12:02:25,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:25,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305495378] [2020-09-11 12:02:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:25,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305495378] [2020-09-11 12:02:25,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599950322] [2020-09-11 12:02:25,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:25,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:25,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:25,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:25,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:25,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:25,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:25,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579738812] [2020-09-11 12:02:25,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:25,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:25,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:25,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:25,491 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-09-11 12:02:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:25,591 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-11 12:02:25,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:25,592 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:25,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:25,593 INFO L225 Difference]: With dead ends: 148 [2020-09-11 12:02:25,594 INFO L226 Difference]: Without dead ends: 146 [2020-09-11 12:02:25,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:25,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-11 12:02:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-09-11 12:02:25,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-11 12:02:25,598 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-11 12:02:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:25,598 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-11 12:02:25,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:25,598 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-11 12:02:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:25,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:25,599 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:25,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-09-11 12:02:25,808 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:25,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-09-11 12:02:25,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:25,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657870328] [2020-09-11 12:02:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:25,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657870328] [2020-09-11 12:02:25,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015129502] [2020-09-11 12:02:25,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:25,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:25,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:25,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:26,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:26,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:26,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415567100] [2020-09-11 12:02:26,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:26,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:26,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:26,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:26,088 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-11 12:02:26,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:26,275 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-09-11 12:02:26,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:26,276 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:26,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:26,277 INFO L225 Difference]: With dead ends: 157 [2020-09-11 12:02:26,278 INFO L226 Difference]: Without dead ends: 155 [2020-09-11 12:02:26,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:02:26,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-11 12:02:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-09-11 12:02:26,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-09-11 12:02:26,282 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-09-11 12:02:26,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:26,282 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-09-11 12:02:26,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-09-11 12:02:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:26,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:26,283 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:26,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:26,484 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:26,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-09-11 12:02:26,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:26,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374154352] [2020-09-11 12:02:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:26,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374154352] [2020-09-11 12:02:26,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400895399] [2020-09-11 12:02:26,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:26,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:26,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:26,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:02:26,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:26,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:26,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:02:26,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675194975] [2020-09-11 12:02:26,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:02:26,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:26,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:02:26,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:26,660 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-09-11 12:02:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:26,767 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-11 12:02:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:26,767 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:02:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:26,769 INFO L225 Difference]: With dead ends: 149 [2020-09-11 12:02:26,769 INFO L226 Difference]: Without dead ends: 147 [2020-09-11 12:02:26,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:02:26,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-11 12:02:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-09-11 12:02:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 12:02:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 12:02:26,773 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 12:02:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:26,773 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 12:02:26,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:02:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 12:02:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:26,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:26,774 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:26,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 12:02:26,975 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:26,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:26,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-09-11 12:02:26,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:26,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470020330] [2020-09-11 12:02:26,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:27,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470020330] [2020-09-11 12:02:27,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279398743] [2020-09-11 12:02:27,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:27,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:27,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:27,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:27,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:27,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:27,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087865701] [2020-09-11 12:02:27,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:27,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:27,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:27,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:27,238 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 12:02:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:27,544 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-09-11 12:02:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:27,545 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:27,546 INFO L225 Difference]: With dead ends: 164 [2020-09-11 12:02:27,546 INFO L226 Difference]: Without dead ends: 159 [2020-09-11 12:02:27,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:27,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-11 12:02:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-11 12:02:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 12:02:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-09-11 12:02:27,550 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-09-11 12:02:27,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:27,550 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-09-11 12:02:27,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-09-11 12:02:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:27,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:27,551 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:27,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-11 12:02:27,753 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:27,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-09-11 12:02:27,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:27,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251060416] [2020-09-11 12:02:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:27,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251060416] [2020-09-11 12:02:27,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718758343] [2020-09-11 12:02:27,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:27,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:27,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:27,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:27,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:28,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:28,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:28,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016803819] [2020-09-11 12:02:28,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:28,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:28,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:28,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:28,019 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-09-11 12:02:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:28,242 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-11 12:02:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:28,243 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:28,244 INFO L225 Difference]: With dead ends: 156 [2020-09-11 12:02:28,245 INFO L226 Difference]: Without dead ends: 154 [2020-09-11 12:02:28,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:02:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-11 12:02:28,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-09-11 12:02:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 12:02:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 12:02:28,249 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 12:02:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:28,249 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 12:02:28,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:28,250 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 12:02:28,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:28,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:28,250 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:28,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:28,451 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-09-11 12:02:28,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:28,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693846067] [2020-09-11 12:02:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:28,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693846067] [2020-09-11 12:02:28,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398428221] [2020-09-11 12:02:28,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:28,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:28,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:28,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:28,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:28,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:28,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:28,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:28,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058989606] [2020-09-11 12:02:28,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:28,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:28,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:28,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:28,734 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 12:02:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:29,153 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-09-11 12:02:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:02:29,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:29,156 INFO L225 Difference]: With dead ends: 176 [2020-09-11 12:02:29,156 INFO L226 Difference]: Without dead ends: 171 [2020-09-11 12:02:29,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:02:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-11 12:02:29,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-11 12:02:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 12:02:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 12:02:29,161 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 12:02:29,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:29,163 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 12:02:29,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 12:02:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:29,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:29,164 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:29,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-09-11 12:02:29,374 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:29,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-09-11 12:02:29,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:29,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700995953] [2020-09-11 12:02:29,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:29,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700995953] [2020-09-11 12:02:29,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643854414] [2020-09-11 12:02:29,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:29,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:29,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:29,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:29,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:29,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:29,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:29,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:29,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090789636] [2020-09-11 12:02:29,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:29,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:29,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:29,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:29,630 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 12:02:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:29,917 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-09-11 12:02:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:29,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:29,919 INFO L225 Difference]: With dead ends: 166 [2020-09-11 12:02:29,919 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 12:02:29,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:29,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 12:02:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-09-11 12:02:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-09-11 12:02:29,925 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-09-11 12:02:29,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:29,926 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-09-11 12:02:29,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-09-11 12:02:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:29,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:29,927 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:30,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:30,136 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:30,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:30,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-09-11 12:02:30,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:30,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904687436] [2020-09-11 12:02:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:30,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904687436] [2020-09-11 12:02:30,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002358711] [2020-09-11 12:02:30,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:30,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:30,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:30,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:30,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:30,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:30,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:30,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816301711] [2020-09-11 12:02:30,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:30,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:30,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:30,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:30,383 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-09-11 12:02:30,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:30,602 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-09-11 12:02:30,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:30,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:30,604 INFO L225 Difference]: With dead ends: 163 [2020-09-11 12:02:30,605 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 12:02:30,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:02:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 12:02:30,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-09-11 12:02:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-11 12:02:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-09-11 12:02:30,609 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-09-11 12:02:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:30,609 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-09-11 12:02:30,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-09-11 12:02:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:30,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:30,610 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:30,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-11 12:02:30,811 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:30,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:30,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-09-11 12:02:30,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:30,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460384008] [2020-09-11 12:02:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:30,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460384008] [2020-09-11 12:02:30,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911278013] [2020-09-11 12:02:30,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:30,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:30,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:30,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:30,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:31,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:31,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:31,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467418524] [2020-09-11 12:02:31,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:31,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:31,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:31,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:31,064 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-09-11 12:02:31,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:31,365 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-09-11 12:02:31,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:31,365 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:31,367 INFO L225 Difference]: With dead ends: 170 [2020-09-11 12:02:31,367 INFO L226 Difference]: Without dead ends: 168 [2020-09-11 12:02:31,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:02:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-11 12:02:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-09-11 12:02:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-11 12:02:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-09-11 12:02:31,373 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-09-11 12:02:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:31,373 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-09-11 12:02:31,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-09-11 12:02:31,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:31,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:31,374 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:31,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:31,584 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:31,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:31,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-09-11 12:02:31,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:31,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138911769] [2020-09-11 12:02:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:31,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138911769] [2020-09-11 12:02:31,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361735561] [2020-09-11 12:02:31,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:31,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:31,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:31,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:31,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:31,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:31,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279002609] [2020-09-11 12:02:31,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:31,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:31,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:31,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:31,822 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-09-11 12:02:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:32,230 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-11 12:02:32,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:02:32,231 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:32,232 INFO L225 Difference]: With dead ends: 177 [2020-09-11 12:02:32,233 INFO L226 Difference]: Without dead ends: 172 [2020-09-11 12:02:32,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:02:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-11 12:02:32,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-09-11 12:02:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-11 12:02:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-09-11 12:02:32,237 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-09-11 12:02:32,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:32,237 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-09-11 12:02:32,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-09-11 12:02:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:32,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:32,239 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:32,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 12:02:32,450 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:32,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-09-11 12:02:32,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:32,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302975284] [2020-09-11 12:02:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:32,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302975284] [2020-09-11 12:02:32,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078137949] [2020-09-11 12:02:32,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:32,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:32,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:32,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:32,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:32,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:32,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:32,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:32,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868432394] [2020-09-11 12:02:32,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:32,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:32,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:32,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:32,667 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-09-11 12:02:33,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:33,081 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-09-11 12:02:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:02:33,082 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:33,084 INFO L225 Difference]: With dead ends: 190 [2020-09-11 12:02:33,084 INFO L226 Difference]: Without dead ends: 182 [2020-09-11 12:02:33,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:02:33,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-11 12:02:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-09-11 12:02:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-09-11 12:02:33,088 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-09-11 12:02:33,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:33,088 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-09-11 12:02:33,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-09-11 12:02:33,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:33,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:33,089 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:33,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-11 12:02:33,290 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-09-11 12:02:33,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:33,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293016548] [2020-09-11 12:02:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:33,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293016548] [2020-09-11 12:02:33,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131982742] [2020-09-11 12:02:33,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:33,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:02:33,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:33,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:33,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:33,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:33,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:33,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:33,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574416490] [2020-09-11 12:02:33,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:33,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:33,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:33,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:33,532 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-09-11 12:02:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:33,958 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-09-11 12:02:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:02:33,959 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:33,961 INFO L225 Difference]: With dead ends: 180 [2020-09-11 12:02:33,961 INFO L226 Difference]: Without dead ends: 175 [2020-09-11 12:02:33,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:02:33,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-11 12:02:33,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-11 12:02:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-09-11 12:02:33,964 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-09-11 12:02:33,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:33,964 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-09-11 12:02:33,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:33,964 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-09-11 12:02:33,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:33,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:33,965 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:34,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-11 12:02:34,166 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:34,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:34,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-09-11 12:02:34,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:34,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363451930] [2020-09-11 12:02:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:34,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363451930] [2020-09-11 12:02:34,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075027104] [2020-09-11 12:02:34,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:34,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:34,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:34,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:34,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:34,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:34,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:34,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213346861] [2020-09-11 12:02:34,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:34,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:34,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:34,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:34,432 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-09-11 12:02:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:34,616 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-09-11 12:02:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:34,617 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:34,618 INFO L225 Difference]: With dead ends: 164 [2020-09-11 12:02:34,618 INFO L226 Difference]: Without dead ends: 162 [2020-09-11 12:02:34,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:02:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-11 12:02:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-09-11 12:02:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-09-11 12:02:34,623 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-09-11 12:02:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:34,623 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-09-11 12:02:34,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-09-11 12:02:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:34,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:34,624 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:34,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-11 12:02:34,826 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:34,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:34,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-09-11 12:02:34,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:34,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522170025] [2020-09-11 12:02:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:34,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522170025] [2020-09-11 12:02:34,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027365117] [2020-09-11 12:02:34,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:34,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:34,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:34,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:34,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:35,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:35,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:35,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883341837] [2020-09-11 12:02:35,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:35,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:35,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:35,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:35,082 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-09-11 12:02:35,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:35,268 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-09-11 12:02:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:35,269 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:35,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:35,270 INFO L225 Difference]: With dead ends: 161 [2020-09-11 12:02:35,270 INFO L226 Difference]: Without dead ends: 159 [2020-09-11 12:02:35,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:02:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-11 12:02:35,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-09-11 12:02:35,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-09-11 12:02:35,274 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-09-11 12:02:35,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:35,274 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-09-11 12:02:35,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:35,274 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-09-11 12:02:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:35,275 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:35,275 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:35,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-11 12:02:35,477 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:35,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:35,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-09-11 12:02:35,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:35,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262965352] [2020-09-11 12:02:35,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:35,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262965352] [2020-09-11 12:02:35,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005820429] [2020-09-11 12:02:35,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:35,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:02:35,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:35,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:35,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:35,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:35,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:35,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524063311] [2020-09-11 12:02:35,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:35,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:35,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:35,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:35,739 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-09-11 12:02:35,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:35,980 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-09-11 12:02:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:35,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:35,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:35,983 INFO L225 Difference]: With dead ends: 165 [2020-09-11 12:02:35,983 INFO L226 Difference]: Without dead ends: 163 [2020-09-11 12:02:35,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-11 12:02:35,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-09-11 12:02:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-09-11 12:02:35,987 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-09-11 12:02:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:35,987 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-09-11 12:02:35,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-09-11 12:02:35,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:35,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:35,988 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:36,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-09-11 12:02:36,189 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:36,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-09-11 12:02:36,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:36,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011539479] [2020-09-11 12:02:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:36,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011539479] [2020-09-11 12:02:36,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223833840] [2020-09-11 12:02:36,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:36,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:36,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:36,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:36,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:36,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156658448] [2020-09-11 12:02:36,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:36,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:36,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:36,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:36,431 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-09-11 12:02:36,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:36,658 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-09-11 12:02:36,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:36,659 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:36,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:36,660 INFO L225 Difference]: With dead ends: 167 [2020-09-11 12:02:36,660 INFO L226 Difference]: Without dead ends: 165 [2020-09-11 12:02:36,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-11 12:02:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-09-11 12:02:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-11 12:02:36,664 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-11 12:02:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:36,664 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-11 12:02:36,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-11 12:02:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:36,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:36,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:36,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:36,866 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:36,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:36,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-09-11 12:02:36,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:36,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162721886] [2020-09-11 12:02:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:36,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162721886] [2020-09-11 12:02:36,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490644657] [2020-09-11 12:02:36,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:37,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:37,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:37,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:37,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:37,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:37,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:37,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020718585] [2020-09-11 12:02:37,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:37,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:37,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:37,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:37,117 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-11 12:02:37,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:37,456 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-09-11 12:02:37,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:02:37,457 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:37,459 INFO L225 Difference]: With dead ends: 168 [2020-09-11 12:02:37,459 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 12:02:37,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:02:37,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 12:02:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-09-11 12:02:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-11 12:02:37,462 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-11 12:02:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:37,462 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-11 12:02:37,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-11 12:02:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:37,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:37,463 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:37,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:37,664 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:37,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-09-11 12:02:37,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:37,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457214201] [2020-09-11 12:02:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:37,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457214201] [2020-09-11 12:02:37,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184549641] [2020-09-11 12:02:37,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:37,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:37,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:37,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:37,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:37,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:37,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:37,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076645258] [2020-09-11 12:02:37,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:37,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:37,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:37,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:37,894 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-11 12:02:38,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:38,132 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-09-11 12:02:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:38,133 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:38,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:38,134 INFO L225 Difference]: With dead ends: 160 [2020-09-11 12:02:38,134 INFO L226 Difference]: Without dead ends: 155 [2020-09-11 12:02:38,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-11 12:02:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-09-11 12:02:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-11 12:02:38,139 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-11 12:02:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:38,139 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-11 12:02:38,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-11 12:02:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:38,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:38,140 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:38,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:38,341 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:38,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:38,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-09-11 12:02:38,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:38,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605757280] [2020-09-11 12:02:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:38,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605757280] [2020-09-11 12:02:38,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2393807] [2020-09-11 12:02:38,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:38,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:38,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:38,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:38,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:38,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:38,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:38,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:38,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589726237] [2020-09-11 12:02:38,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:38,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:38,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:38,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:38,619 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-11 12:02:39,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:39,042 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-09-11 12:02:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:02:39,043 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:39,044 INFO L225 Difference]: With dead ends: 189 [2020-09-11 12:02:39,044 INFO L226 Difference]: Without dead ends: 181 [2020-09-11 12:02:39,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:02:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-11 12:02:39,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-09-11 12:02:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-11 12:02:39,048 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-11 12:02:39,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:39,048 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-11 12:02:39,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-11 12:02:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:39,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:39,049 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:39,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:39,258 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:39,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:39,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-09-11 12:02:39,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:39,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240987163] [2020-09-11 12:02:39,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:39,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240987163] [2020-09-11 12:02:39,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250099782] [2020-09-11 12:02:39,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:39,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:39,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:39,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:39,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:39,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:39,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:39,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126816465] [2020-09-11 12:02:39,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:39,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:39,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:39,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:39,499 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-11 12:02:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:39,811 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-09-11 12:02:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:02:39,812 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:39,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:39,813 INFO L225 Difference]: With dead ends: 169 [2020-09-11 12:02:39,813 INFO L226 Difference]: Without dead ends: 167 [2020-09-11 12:02:39,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:02:39,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-11 12:02:39,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-09-11 12:02:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-11 12:02:39,817 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-11 12:02:39,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:39,817 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-11 12:02:39,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:39,818 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-11 12:02:39,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:39,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:39,818 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:40,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-09-11 12:02:40,027 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:40,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:40,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-09-11 12:02:40,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:40,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988519527] [2020-09-11 12:02:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:40,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988519527] [2020-09-11 12:02:40,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508381652] [2020-09-11 12:02:40,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:40,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:40,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:40,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:40,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:40,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:40,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:40,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:40,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276261455] [2020-09-11 12:02:40,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:40,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:40,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:40,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:40,265 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-11 12:02:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:40,693 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-09-11 12:02:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:02:40,694 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:40,695 INFO L225 Difference]: With dead ends: 192 [2020-09-11 12:02:40,696 INFO L226 Difference]: Without dead ends: 184 [2020-09-11 12:02:40,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:02:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-11 12:02:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-09-11 12:02:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-11 12:02:40,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-09-11 12:02:40,699 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-09-11 12:02:40,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:40,700 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-09-11 12:02:40,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:40,700 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-09-11 12:02:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:40,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:40,701 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:40,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:40,908 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:40,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:40,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-09-11 12:02:40,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:40,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319248937] [2020-09-11 12:02:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:40,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319248937] [2020-09-11 12:02:40,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944733407] [2020-09-11 12:02:40,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:41,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:41,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:41,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:41,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:41,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:41,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244211606] [2020-09-11 12:02:41,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:41,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:41,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:41,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:41,133 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-09-11 12:02:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:41,550 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-09-11 12:02:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:02:41,550 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:41,552 INFO L225 Difference]: With dead ends: 180 [2020-09-11 12:02:41,552 INFO L226 Difference]: Without dead ends: 175 [2020-09-11 12:02:41,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:02:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-11 12:02:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-09-11 12:02:41,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-11 12:02:41,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-09-11 12:02:41,556 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-09-11 12:02:41,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:41,556 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-09-11 12:02:41,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-09-11 12:02:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:41,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:41,557 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:41,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-09-11 12:02:41,759 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:41,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:41,759 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-09-11 12:02:41,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:41,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874871738] [2020-09-11 12:02:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:41,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874871738] [2020-09-11 12:02:41,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512692994] [2020-09-11 12:02:41,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:41,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:41,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:41,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:41,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:42,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:42,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:42,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-11 12:02:42,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626584602] [2020-09-11 12:02:42,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:02:42,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:42,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:02:42,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:42,074 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-09-11 12:02:42,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:42,256 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-09-11 12:02:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:42,257 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-09-11 12:02:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:42,258 INFO L225 Difference]: With dead ends: 164 [2020-09-11 12:02:42,259 INFO L226 Difference]: Without dead ends: 159 [2020-09-11 12:02:42,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:02:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-11 12:02:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-11 12:02:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 12:02:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-09-11 12:02:42,262 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-09-11 12:02:42,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:42,262 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-09-11 12:02:42,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:02:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-09-11 12:02:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:42,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:42,263 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:42,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:42,464 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:42,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-09-11 12:02:42,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:42,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016389701] [2020-09-11 12:02:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:42,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016389701] [2020-09-11 12:02:42,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431522357] [2020-09-11 12:02:42,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:42,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:02:42,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:42,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:42,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:42,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:42,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:42,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838622623] [2020-09-11 12:02:42,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:42,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:42,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:42,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:42,819 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-09-11 12:02:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:42,881 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-11 12:02:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:42,882 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:42,883 INFO L225 Difference]: With dead ends: 156 [2020-09-11 12:02:42,883 INFO L226 Difference]: Without dead ends: 153 [2020-09-11 12:02:42,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:42,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-11 12:02:42,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-09-11 12:02:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-11 12:02:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-11 12:02:42,888 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-11 12:02:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:42,888 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-11 12:02:42,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-11 12:02:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:42,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:42,889 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:43,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-11 12:02:43,093 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:43,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-09-11 12:02:43,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:43,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960823929] [2020-09-11 12:02:43,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:43,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960823929] [2020-09-11 12:02:43,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243040113] [2020-09-11 12:02:43,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:43,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:43,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:43,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:43,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:43,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:43,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:43,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808187227] [2020-09-11 12:02:43,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:43,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:43,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:43,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:43,430 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-11 12:02:43,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:43,517 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-09-11 12:02:43,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:43,518 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:43,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:43,520 INFO L225 Difference]: With dead ends: 170 [2020-09-11 12:02:43,520 INFO L226 Difference]: Without dead ends: 167 [2020-09-11 12:02:43,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:43,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-11 12:02:43,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-09-11 12:02:43,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-11 12:02:43,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-11 12:02:43,525 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-11 12:02:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:43,528 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-11 12:02:43,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:43,528 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-11 12:02:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:43,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:43,529 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:43,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:43,743 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:43,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:43,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-09-11 12:02:43,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:43,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594904195] [2020-09-11 12:02:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:43,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594904195] [2020-09-11 12:02:43,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886335942] [2020-09-11 12:02:43,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:43,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:43,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:43,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:43,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:44,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:44,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:44,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837978058] [2020-09-11 12:02:44,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:44,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:44,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:44,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:44,060 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-11 12:02:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:44,171 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-09-11 12:02:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:44,172 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:44,173 INFO L225 Difference]: With dead ends: 169 [2020-09-11 12:02:44,173 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 12:02:44,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:44,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 12:02:44,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-09-11 12:02:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-11 12:02:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-09-11 12:02:44,176 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-09-11 12:02:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:44,176 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-09-11 12:02:44,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-09-11 12:02:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:44,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:44,176 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:44,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:44,378 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:44,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:44,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-09-11 12:02:44,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:44,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577213466] [2020-09-11 12:02:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:44,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577213466] [2020-09-11 12:02:44,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285577903] [2020-09-11 12:02:44,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:44,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:02:44,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:44,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:44,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:44,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:44,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:44,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258479132] [2020-09-11 12:02:44,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:44,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:44,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:44,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:44,689 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-09-11 12:02:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:44,815 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-09-11 12:02:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:44,816 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:44,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:44,817 INFO L225 Difference]: With dead ends: 168 [2020-09-11 12:02:44,817 INFO L226 Difference]: Without dead ends: 165 [2020-09-11 12:02:44,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:02:44,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-11 12:02:44,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-09-11 12:02:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-11 12:02:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-09-11 12:02:44,822 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-09-11 12:02:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:44,822 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-09-11 12:02:44,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-09-11 12:02:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:44,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:44,823 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:45,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-09-11 12:02:45,034 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:45,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:45,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-09-11 12:02:45,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:45,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462759984] [2020-09-11 12:02:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:45,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462759984] [2020-09-11 12:02:45,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761227819] [2020-09-11 12:02:45,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:45,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:45,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:45,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:45,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:45,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948721107] [2020-09-11 12:02:45,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:45,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:45,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:45,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:45,375 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-09-11 12:02:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:45,557 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-09-11 12:02:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:45,558 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:45,559 INFO L225 Difference]: With dead ends: 167 [2020-09-11 12:02:45,560 INFO L226 Difference]: Without dead ends: 164 [2020-09-11 12:02:45,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:02:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-11 12:02:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-09-11 12:02:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-11 12:02:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-09-11 12:02:45,565 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-09-11 12:02:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:45,566 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-09-11 12:02:45,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-09-11 12:02:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:45,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:45,567 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:45,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:45,781 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:45,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:45,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-09-11 12:02:45,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:45,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357467345] [2020-09-11 12:02:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:45,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357467345] [2020-09-11 12:02:45,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292407671] [2020-09-11 12:02:45,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:45,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:45,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:45,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:45,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:46,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:46,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:46,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:46,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639634244] [2020-09-11 12:02:46,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:46,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:46,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:46,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:46,070 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-09-11 12:02:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:46,308 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-09-11 12:02:46,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:46,309 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:46,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:46,311 INFO L225 Difference]: With dead ends: 176 [2020-09-11 12:02:46,311 INFO L226 Difference]: Without dead ends: 170 [2020-09-11 12:02:46,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:46,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-11 12:02:46,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-09-11 12:02:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-11 12:02:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-09-11 12:02:46,317 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-09-11 12:02:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:46,317 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-09-11 12:02:46,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-09-11 12:02:46,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:46,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:46,319 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:46,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:46,532 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:46,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-09-11 12:02:46,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:46,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043864561] [2020-09-11 12:02:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:46,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043864561] [2020-09-11 12:02:46,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869719313] [2020-09-11 12:02:46,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:46,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:46,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:46,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:46,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:46,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:46,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:46,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963130384] [2020-09-11 12:02:46,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:46,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:46,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:46,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:46,947 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-09-11 12:02:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:47,027 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-09-11 12:02:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:47,028 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:47,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:47,030 INFO L225 Difference]: With dead ends: 163 [2020-09-11 12:02:47,030 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 12:02:47,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 12:02:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-09-11 12:02:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-11 12:02:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-09-11 12:02:47,036 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-09-11 12:02:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:47,036 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-09-11 12:02:47,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-09-11 12:02:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:47,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:47,037 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:47,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-09-11 12:02:47,251 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:47,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:47,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-09-11 12:02:47,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:47,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900522998] [2020-09-11 12:02:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:47,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900522998] [2020-09-11 12:02:47,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617084059] [2020-09-11 12:02:47,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:47,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:47,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:47,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:47,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:47,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:47,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:47,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152931342] [2020-09-11 12:02:47,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:47,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:47,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:47,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:47,611 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-09-11 12:02:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:47,766 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-09-11 12:02:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:47,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:47,768 INFO L225 Difference]: With dead ends: 172 [2020-09-11 12:02:47,769 INFO L226 Difference]: Without dead ends: 170 [2020-09-11 12:02:47,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:02:47,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-11 12:02:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-09-11 12:02:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 12:02:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-11 12:02:47,773 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-11 12:02:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:47,774 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-11 12:02:47,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-11 12:02:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:47,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:47,774 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:47,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:47,986 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:47,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:47,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-09-11 12:02:47,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:47,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147425135] [2020-09-11 12:02:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:48,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147425135] [2020-09-11 12:02:48,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060101687] [2020-09-11 12:02:48,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:48,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:48,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:48,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:48,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:49,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:49,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:49,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535210022] [2020-09-11 12:02:49,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:49,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:49,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:49,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:49,022 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-11 12:02:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:49,260 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-11 12:02:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:49,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:49,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:49,261 INFO L225 Difference]: With dead ends: 179 [2020-09-11 12:02:49,262 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 12:02:49,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 12:02:49,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-09-11 12:02:49,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-11 12:02:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-09-11 12:02:49,266 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-09-11 12:02:49,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:49,266 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-09-11 12:02:49,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:49,266 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-09-11 12:02:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:49,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:49,267 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:49,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-09-11 12:02:49,476 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:49,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:49,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-09-11 12:02:49,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:49,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731557439] [2020-09-11 12:02:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:49,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731557439] [2020-09-11 12:02:49,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558302382] [2020-09-11 12:02:49,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:49,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:49,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:49,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:49,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:49,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:49,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:49,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633073011] [2020-09-11 12:02:49,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:49,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:49,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:49,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:49,806 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-09-11 12:02:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:49,993 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-11 12:02:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:49,994 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:49,995 INFO L225 Difference]: With dead ends: 179 [2020-09-11 12:02:49,996 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 12:02:49,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 12:02:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-09-11 12:02:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 12:02:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-11 12:02:50,002 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-11 12:02:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:50,002 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-11 12:02:50,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-11 12:02:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:50,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:50,003 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:50,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-11 12:02:50,213 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:50,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-09-11 12:02:50,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:50,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33811203] [2020-09-11 12:02:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:50,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33811203] [2020-09-11 12:02:50,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103440370] [2020-09-11 12:02:50,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:50,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:50,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:50,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:50,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:50,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:50,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:50,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390204674] [2020-09-11 12:02:50,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:50,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:50,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:50,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:50,527 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-11 12:02:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:50,777 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-09-11 12:02:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:50,778 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:50,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:50,780 INFO L225 Difference]: With dead ends: 184 [2020-09-11 12:02:50,780 INFO L226 Difference]: Without dead ends: 182 [2020-09-11 12:02:50,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:50,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-11 12:02:50,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-09-11 12:02:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 12:02:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-09-11 12:02:50,783 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-09-11 12:02:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:50,783 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-09-11 12:02:50,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-09-11 12:02:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:50,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:50,784 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:50,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-09-11 12:02:50,992 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:50,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-09-11 12:02:50,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:50,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058115944] [2020-09-11 12:02:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:51,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058115944] [2020-09-11 12:02:51,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428574159] [2020-09-11 12:02:51,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:51,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:51,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:51,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:51,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:51,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625865829] [2020-09-11 12:02:51,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:51,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:51,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:51,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:51,301 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-09-11 12:02:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:51,591 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-09-11 12:02:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:51,592 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:51,593 INFO L225 Difference]: With dead ends: 179 [2020-09-11 12:02:51,593 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 12:02:51,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 12:02:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-09-11 12:02:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-11 12:02:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-09-11 12:02:51,598 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-09-11 12:02:51,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:51,598 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-09-11 12:02:51,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-09-11 12:02:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:51,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:51,598 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:51,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:51,799 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:51,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-09-11 12:02:51,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:51,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153158639] [2020-09-11 12:02:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:51,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153158639] [2020-09-11 12:02:51,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944861456] [2020-09-11 12:02:51,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:51,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:51,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:51,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:51,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:52,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:52,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:52,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719600081] [2020-09-11 12:02:52,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:52,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:52,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:52,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:52,113 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-09-11 12:02:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:52,314 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-09-11 12:02:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:52,315 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:52,317 INFO L225 Difference]: With dead ends: 176 [2020-09-11 12:02:52,317 INFO L226 Difference]: Without dead ends: 174 [2020-09-11 12:02:52,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-11 12:02:52,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-09-11 12:02:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:02:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-09-11 12:02:52,320 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-09-11 12:02:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:52,320 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-09-11 12:02:52,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-09-11 12:02:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:52,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:52,321 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:52,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:52,522 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:52,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-09-11 12:02:52,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:52,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144460464] [2020-09-11 12:02:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:52,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144460464] [2020-09-11 12:02:52,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593485483] [2020-09-11 12:02:52,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:52,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:02:52,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:52,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:52,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:52,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:52,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:52,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449351669] [2020-09-11 12:02:52,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:52,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:52,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:52,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:52,851 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-09-11 12:02:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:53,117 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-11 12:02:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:53,118 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:53,120 INFO L225 Difference]: With dead ends: 185 [2020-09-11 12:02:53,120 INFO L226 Difference]: Without dead ends: 183 [2020-09-11 12:02:53,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-11 12:02:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-09-11 12:02:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:02:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-09-11 12:02:53,124 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-09-11 12:02:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:53,124 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-09-11 12:02:53,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-09-11 12:02:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:53,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:53,124 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:53,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:53,325 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:53,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:53,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-09-11 12:02:53,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:53,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600312050] [2020-09-11 12:02:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:53,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600312050] [2020-09-11 12:02:53,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753589180] [2020-09-11 12:02:53,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:53,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:53,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:53,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:53,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:53,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:53,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:53,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027817113] [2020-09-11 12:02:53,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:53,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:53,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:53,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:53,622 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-09-11 12:02:53,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:53,866 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-11 12:02:53,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:53,866 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:53,868 INFO L225 Difference]: With dead ends: 185 [2020-09-11 12:02:53,868 INFO L226 Difference]: Without dead ends: 183 [2020-09-11 12:02:53,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-11 12:02:53,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-09-11 12:02:53,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-11 12:02:53,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-09-11 12:02:53,872 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-09-11 12:02:53,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:53,872 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-09-11 12:02:53,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:53,872 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-09-11 12:02:53,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:53,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:53,873 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:54,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:54,082 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:54,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-09-11 12:02:54,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:54,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695293554] [2020-09-11 12:02:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:54,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695293554] [2020-09-11 12:02:54,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129171995] [2020-09-11 12:02:54,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:54,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:54,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:54,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:54,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:54,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:54,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:54,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947778039] [2020-09-11 12:02:54,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:54,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:54,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:54,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:54,522 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-09-11 12:02:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:54,612 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-09-11 12:02:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:54,613 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:54,615 INFO L225 Difference]: With dead ends: 182 [2020-09-11 12:02:54,615 INFO L226 Difference]: Without dead ends: 180 [2020-09-11 12:02:54,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-11 12:02:54,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-09-11 12:02:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:02:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-09-11 12:02:54,624 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-09-11 12:02:54,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:54,624 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-09-11 12:02:54,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:54,626 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-09-11 12:02:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:54,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:54,627 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:54,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-09-11 12:02:54,840 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:54,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:54,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-09-11 12:02:54,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:54,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132303933] [2020-09-11 12:02:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:54,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132303933] [2020-09-11 12:02:54,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45356349] [2020-09-11 12:02:54,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:55,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:55,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:55,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:55,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:55,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:55,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:55,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093737869] [2020-09-11 12:02:55,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:55,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:55,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:55,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:55,152 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-09-11 12:02:55,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:55,385 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-09-11 12:02:55,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:02:55,386 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:55,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:55,388 INFO L225 Difference]: With dead ends: 185 [2020-09-11 12:02:55,388 INFO L226 Difference]: Without dead ends: 183 [2020-09-11 12:02:55,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-11 12:02:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-09-11 12:02:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:02:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-11 12:02:55,394 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-11 12:02:55,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:55,395 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-11 12:02:55,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-11 12:02:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:55,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:55,396 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:55,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:55,608 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:55,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:55,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-09-11 12:02:55,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:55,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264695690] [2020-09-11 12:02:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:55,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264695690] [2020-09-11 12:02:55,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071283058] [2020-09-11 12:02:55,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:55,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:55,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:55,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:55,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:55,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274729183] [2020-09-11 12:02:55,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:55,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:55,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:55,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:55,984 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-11 12:02:56,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:56,232 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-09-11 12:02:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:02:56,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:56,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:56,234 INFO L225 Difference]: With dead ends: 191 [2020-09-11 12:02:56,235 INFO L226 Difference]: Without dead ends: 189 [2020-09-11 12:02:56,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-11 12:02:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-09-11 12:02:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:02:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-09-11 12:02:56,238 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-09-11 12:02:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:56,238 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-09-11 12:02:56,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-09-11 12:02:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:56,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:56,238 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:56,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:56,439 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:56,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-09-11 12:02:56,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:56,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927697065] [2020-09-11 12:02:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:56,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927697065] [2020-09-11 12:02:56,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183026450] [2020-09-11 12:02:56,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:56,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:56,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:56,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:56,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:56,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:56,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:56,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209055450] [2020-09-11 12:02:56,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:56,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:56,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:56,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:56,748 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-09-11 12:02:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:57,047 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-09-11 12:02:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:57,048 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:57,049 INFO L225 Difference]: With dead ends: 187 [2020-09-11 12:02:57,049 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 12:02:57,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:02:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 12:02:57,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-09-11 12:02:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:02:57,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-11 12:02:57,057 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-11 12:02:57,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:57,057 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-11 12:02:57,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:57,057 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-11 12:02:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:57,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:57,058 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:57,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-09-11 12:02:57,259 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:57,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-09-11 12:02:57,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:57,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129241828] [2020-09-11 12:02:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:57,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129241828] [2020-09-11 12:02:57,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198215675] [2020-09-11 12:02:57,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:57,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:57,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:57,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:57,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:57,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:57,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:57,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343796114] [2020-09-11 12:02:57,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:57,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:57,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:57,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:57,591 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-11 12:02:57,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:57,897 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-09-11 12:02:57,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:57,898 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:57,900 INFO L225 Difference]: With dead ends: 198 [2020-09-11 12:02:57,900 INFO L226 Difference]: Without dead ends: 196 [2020-09-11 12:02:57,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:02:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-11 12:02:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-09-11 12:02:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:02:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-09-11 12:02:57,904 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-09-11 12:02:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:57,904 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-09-11 12:02:57,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-09-11 12:02:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:57,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:57,905 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:58,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:58,105 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:58,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:58,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-09-11 12:02:58,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:58,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988186144] [2020-09-11 12:02:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:58,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988186144] [2020-09-11 12:02:58,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062751898] [2020-09-11 12:02:58,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:58,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:58,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:58,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:58,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:58,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:58,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:58,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354944869] [2020-09-11 12:02:58,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:58,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:58,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:58,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:58,448 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-09-11 12:02:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:58,752 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-09-11 12:02:58,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:58,753 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:58,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:58,754 INFO L225 Difference]: With dead ends: 189 [2020-09-11 12:02:58,755 INFO L226 Difference]: Without dead ends: 187 [2020-09-11 12:02:58,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:02:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-11 12:02:58,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-09-11 12:02:58,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:02:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-09-11 12:02:58,758 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-09-11 12:02:58,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:58,758 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-09-11 12:02:58,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:58,758 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-09-11 12:02:58,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:58,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:58,759 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:58,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-11 12:02:58,962 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:58,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:58,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-09-11 12:02:58,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:58,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118770175] [2020-09-11 12:02:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:59,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118770175] [2020-09-11 12:02:59,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553707809] [2020-09-11 12:02:59,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:59,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:59,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:59,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:59,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:59,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:59,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:59,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623359461] [2020-09-11 12:02:59,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:59,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:59,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:59,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:59,315 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-09-11 12:02:59,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:59,435 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-09-11 12:02:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:59,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:59,437 INFO L225 Difference]: With dead ends: 178 [2020-09-11 12:02:59,438 INFO L226 Difference]: Without dead ends: 176 [2020-09-11 12:02:59,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:59,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-11 12:02:59,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-09-11 12:02:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:02:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-09-11 12:02:59,441 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-09-11 12:02:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:59,441 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-09-11 12:02:59,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-09-11 12:02:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:59,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:59,442 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:59,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:59,642 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:59,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:59,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-09-11 12:02:59,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:59,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071687983] [2020-09-11 12:02:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:59,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071687983] [2020-09-11 12:02:59,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016631912] [2020-09-11 12:02:59,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:59,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:59,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:59,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:59,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:59,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:59,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97131124] [2020-09-11 12:02:59,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:59,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:59,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:59,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:59,974 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-09-11 12:03:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:00,230 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-09-11 12:03:00,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:00,231 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:00,232 INFO L225 Difference]: With dead ends: 193 [2020-09-11 12:03:00,232 INFO L226 Difference]: Without dead ends: 191 [2020-09-11 12:03:00,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:03:00,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-11 12:03:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-09-11 12:03:00,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:03:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-09-11 12:03:00,236 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-09-11 12:03:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:00,236 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-09-11 12:03:00,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-09-11 12:03:00,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:00,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:00,237 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:00,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-09-11 12:03:00,447 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:00,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-09-11 12:03:00,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:00,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131649404] [2020-09-11 12:03:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:00,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131649404] [2020-09-11 12:03:00,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266454139] [2020-09-11 12:03:00,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:00,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:00,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:01,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:01,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:01,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930200564] [2020-09-11 12:03:01,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:01,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:01,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:01,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:01,401 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-09-11 12:03:01,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:01,715 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-09-11 12:03:01,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:01,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:01,718 INFO L225 Difference]: With dead ends: 195 [2020-09-11 12:03:01,718 INFO L226 Difference]: Without dead ends: 193 [2020-09-11 12:03:01,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:03:01,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-11 12:03:01,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-09-11 12:03:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:03:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-09-11 12:03:01,722 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-09-11 12:03:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:01,722 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-09-11 12:03:01,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-09-11 12:03:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:01,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:01,723 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:01,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:01,928 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:01,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:01,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-09-11 12:03:01,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:01,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062107036] [2020-09-11 12:03:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:02,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062107036] [2020-09-11 12:03:02,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791768918] [2020-09-11 12:03:02,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:02,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:02,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:02,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:02,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:02,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:02,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:02,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658653647] [2020-09-11 12:03:02,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:02,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:02,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:02,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:02,257 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-09-11 12:03:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:02,398 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-09-11 12:03:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:03:02,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:02,400 INFO L225 Difference]: With dead ends: 174 [2020-09-11 12:03:02,400 INFO L226 Difference]: Without dead ends: 172 [2020-09-11 12:03:02,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:03:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-11 12:03:02,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-09-11 12:03:02,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:03:02,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-09-11 12:03:02,404 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-09-11 12:03:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:02,404 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-09-11 12:03:02,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-09-11 12:03:02,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:02,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:02,405 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:02,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-09-11 12:03:02,614 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:02,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:02,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-09-11 12:03:02,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:02,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278253592] [2020-09-11 12:03:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:02,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278253592] [2020-09-11 12:03:02,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989771469] [2020-09-11 12:03:02,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:02,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:03:02,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:02,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:02,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:02,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:02,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:02,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193408658] [2020-09-11 12:03:02,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:02,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:02,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:02,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:02,916 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-09-11 12:03:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:03,220 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-09-11 12:03:03,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:03:03,221 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:03,222 INFO L225 Difference]: With dead ends: 189 [2020-09-11 12:03:03,222 INFO L226 Difference]: Without dead ends: 187 [2020-09-11 12:03:03,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:03:03,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-11 12:03:03,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-09-11 12:03:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:03:03,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-09-11 12:03:03,226 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-09-11 12:03:03,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:03,226 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-09-11 12:03:03,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:03,226 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-09-11 12:03:03,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:03,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:03,227 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:03,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:03,428 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:03,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-09-11 12:03:03,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:03,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978876513] [2020-09-11 12:03:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:03,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978876513] [2020-09-11 12:03:03,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479799060] [2020-09-11 12:03:03,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:03,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:03:03,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:03,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:03,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:03,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:03,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:03,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932155664] [2020-09-11 12:03:03,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:03,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:03,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:03,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:03,745 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-09-11 12:03:03,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:03,913 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-09-11 12:03:03,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:03:03,914 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:03,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:03,915 INFO L225 Difference]: With dead ends: 175 [2020-09-11 12:03:03,915 INFO L226 Difference]: Without dead ends: 173 [2020-09-11 12:03:03,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:03:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-11 12:03:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-09-11 12:03:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 12:03:03,919 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 12:03:03,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:03,919 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 12:03:03,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 12:03:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:03,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:03,920 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:04,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:04,120 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:04,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-09-11 12:03:04,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:04,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235617782] [2020-09-11 12:03:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:04,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235617782] [2020-09-11 12:03:04,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310856355] [2020-09-11 12:03:04,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:04,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:03:04,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:04,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:04,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:04,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:04,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:04,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:04,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213211223] [2020-09-11 12:03:04,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:04,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:04,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:04,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:04,445 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 12:03:04,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:04,819 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-09-11 12:03:04,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:04,820 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:04,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:04,822 INFO L225 Difference]: With dead ends: 195 [2020-09-11 12:03:04,822 INFO L226 Difference]: Without dead ends: 190 [2020-09-11 12:03:04,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:03:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-11 12:03:04,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-09-11 12:03:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-11 12:03:04,824 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-11 12:03:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:04,825 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-11 12:03:04,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-11 12:03:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:04,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:04,825 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:05,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:05,026 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:05,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:05,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-09-11 12:03:05,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:05,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83510532] [2020-09-11 12:03:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:05,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83510532] [2020-09-11 12:03:05,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592012138] [2020-09-11 12:03:05,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:05,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:03:05,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:05,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:05,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:05,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:05,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:05,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553438047] [2020-09-11 12:03:05,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:05,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:05,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:05,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:05,355 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-11 12:03:05,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:05,671 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-09-11 12:03:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:03:05,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:05,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:05,673 INFO L225 Difference]: With dead ends: 187 [2020-09-11 12:03:05,673 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 12:03:05,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:05,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 12:03:05,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-09-11 12:03:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 12:03:05,677 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 12:03:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:05,678 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 12:03:05,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 12:03:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:05,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:05,679 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:05,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:05,879 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:05,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:05,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-09-11 12:03:05,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:05,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633712361] [2020-09-11 12:03:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:05,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633712361] [2020-09-11 12:03:05,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671814655] [2020-09-11 12:03:05,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:06,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:06,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:06,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:06,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:06,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:06,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694523540] [2020-09-11 12:03:06,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:06,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:06,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:06,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:06,204 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 12:03:06,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:06,765 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-09-11 12:03:06,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:03:06,766 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:06,767 INFO L225 Difference]: With dead ends: 212 [2020-09-11 12:03:06,768 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 12:03:06,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:03:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 12:03:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-11 12:03:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 12:03:06,771 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 12:03:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:06,772 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 12:03:06,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 12:03:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:06,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:06,772 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:06,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-09-11 12:03:06,973 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:06,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-09-11 12:03:06,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:06,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589896565] [2020-09-11 12:03:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:07,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589896565] [2020-09-11 12:03:07,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040631603] [2020-09-11 12:03:07,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:07,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:07,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:07,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:07,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:07,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:07,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:07,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:07,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773506568] [2020-09-11 12:03:07,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:07,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:07,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:07,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:07,281 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 12:03:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:07,644 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-11 12:03:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:07,644 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:07,646 INFO L225 Difference]: With dead ends: 202 [2020-09-11 12:03:07,646 INFO L226 Difference]: Without dead ends: 197 [2020-09-11 12:03:07,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:03:07,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-11 12:03:07,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-09-11 12:03:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:03:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-09-11 12:03:07,650 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-09-11 12:03:07,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:07,650 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-09-11 12:03:07,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:07,651 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-09-11 12:03:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:07,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:07,651 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:07,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:07,861 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:07,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-09-11 12:03:07,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:07,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501718915] [2020-09-11 12:03:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:07,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501718915] [2020-09-11 12:03:07,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373251000] [2020-09-11 12:03:07,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:08,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:03:08,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:08,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:08,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:08,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:08,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:08,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337476558] [2020-09-11 12:03:08,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:08,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:08,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:08,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:08,723 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-09-11 12:03:09,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:09,062 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-09-11 12:03:09,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:09,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:09,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:09,064 INFO L225 Difference]: With dead ends: 198 [2020-09-11 12:03:09,064 INFO L226 Difference]: Without dead ends: 196 [2020-09-11 12:03:09,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-11 12:03:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-09-11 12:03:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-11 12:03:09,068 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-11 12:03:09,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:09,068 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-11 12:03:09,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:09,068 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-11 12:03:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:09,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:09,069 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:09,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-11 12:03:09,270 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:09,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:09,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-09-11 12:03:09,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:09,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960677674] [2020-09-11 12:03:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:09,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960677674] [2020-09-11 12:03:09,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956906290] [2020-09-11 12:03:09,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:09,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:03:09,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:09,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:09,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:09,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:09,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496858869] [2020-09-11 12:03:09,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:09,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:09,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:09,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:09,598 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-11 12:03:10,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:10,097 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-09-11 12:03:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:03:10,098 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:10,099 INFO L225 Difference]: With dead ends: 209 [2020-09-11 12:03:10,100 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 12:03:10,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:03:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 12:03:10,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-11 12:03:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:10,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 12:03:10,104 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 12:03:10,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:10,104 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 12:03:10,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 12:03:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:10,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:10,105 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:10,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-11 12:03:10,306 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:10,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:10,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-09-11 12:03:10,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:10,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192315781] [2020-09-11 12:03:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:10,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192315781] [2020-09-11 12:03:10,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270642724] [2020-09-11 12:03:10,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:10,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:03:10,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:10,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:10,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:10,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:10,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:10,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:10,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887161472] [2020-09-11 12:03:10,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:10,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:10,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:10,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:10,650 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 12:03:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:11,280 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-09-11 12:03:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:03:11,281 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:11,282 INFO L225 Difference]: With dead ends: 217 [2020-09-11 12:03:11,282 INFO L226 Difference]: Without dead ends: 212 [2020-09-11 12:03:11,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-09-11 12:03:11,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-11 12:03:11,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-09-11 12:03:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-11 12:03:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-11 12:03:11,286 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-09-11 12:03:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:11,286 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-11 12:03:11,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-11 12:03:11,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:11,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:11,287 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:11,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-11 12:03:11,493 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:11,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-09-11 12:03:11,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:11,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875947466] [2020-09-11 12:03:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:11,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875947466] [2020-09-11 12:03:11,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381750692] [2020-09-11 12:03:11,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:11,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:03:11,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:11,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:11,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:13,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:13,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:13,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:13,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115874633] [2020-09-11 12:03:13,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:13,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:13,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:13,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-09-11 12:03:13,882 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-09-11 12:03:18,217 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-11 12:03:22,450 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-11 12:03:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:22,957 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-09-11 12:03:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:03:22,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:22,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:22,959 INFO L225 Difference]: With dead ends: 236 [2020-09-11 12:03:22,959 INFO L226 Difference]: Without dead ends: 228 [2020-09-11 12:03:22,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-09-11 12:03:22,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-11 12:03:22,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-09-11 12:03:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:03:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-09-11 12:03:22,963 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-09-11 12:03:22,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:22,963 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-09-11 12:03:22,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:22,963 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-09-11 12:03:22,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:22,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:22,964 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:23,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-11 12:03:23,172 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:23,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:23,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-09-11 12:03:23,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:23,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384380227] [2020-09-11 12:03:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:23,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384380227] [2020-09-11 12:03:23,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201905783] [2020-09-11 12:03:23,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:23,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:23,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:23,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:23,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:23,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:23,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:23,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805706655] [2020-09-11 12:03:23,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:23,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:23,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:23,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:23,538 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-09-11 12:03:24,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:24,183 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-09-11 12:03:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:03:24,184 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:24,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:24,186 INFO L225 Difference]: With dead ends: 219 [2020-09-11 12:03:24,186 INFO L226 Difference]: Without dead ends: 214 [2020-09-11 12:03:24,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-09-11 12:03:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-11 12:03:24,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-09-11 12:03:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:03:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-09-11 12:03:24,189 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-09-11 12:03:24,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:24,189 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-09-11 12:03:24,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:24,190 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-09-11 12:03:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:24,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:24,190 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:24,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:24,392 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:24,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-09-11 12:03:24,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:24,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126670864] [2020-09-11 12:03:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:24,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126670864] [2020-09-11 12:03:24,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360436284] [2020-09-11 12:03:24,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:24,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:24,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:24,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:24,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:24,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:24,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:24,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645521958] [2020-09-11 12:03:24,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:24,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:24,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:24,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:24,703 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-09-11 12:03:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:25,034 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-09-11 12:03:25,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:03:25,035 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:25,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:25,036 INFO L225 Difference]: With dead ends: 197 [2020-09-11 12:03:25,036 INFO L226 Difference]: Without dead ends: 195 [2020-09-11 12:03:25,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-11 12:03:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-09-11 12:03:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-09-11 12:03:25,040 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-09-11 12:03:25,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:25,040 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-09-11 12:03:25,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:25,040 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-09-11 12:03:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:25,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:25,041 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:25,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:25,243 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:25,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:25,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-09-11 12:03:25,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:25,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279316430] [2020-09-11 12:03:25,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:25,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279316430] [2020-09-11 12:03:25,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959883475] [2020-09-11 12:03:25,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:25,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:03:25,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:25,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:25,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:25,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:25,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:25,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915328729] [2020-09-11 12:03:25,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:25,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:25,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:25,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:25,537 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-09-11 12:03:25,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:25,868 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-09-11 12:03:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:03:25,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:25,869 INFO L225 Difference]: With dead ends: 202 [2020-09-11 12:03:25,869 INFO L226 Difference]: Without dead ends: 200 [2020-09-11 12:03:25,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-11 12:03:25,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-09-11 12:03:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:25,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-09-11 12:03:25,874 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-09-11 12:03:25,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:25,874 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-09-11 12:03:25,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:25,874 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-09-11 12:03:25,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:25,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:25,875 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:26,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-09-11 12:03:26,076 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:26,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:26,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-09-11 12:03:26,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:26,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865570308] [2020-09-11 12:03:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:26,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865570308] [2020-09-11 12:03:26,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894171107] [2020-09-11 12:03:26,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:26,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:03:26,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:26,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:26,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:26,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:26,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:26,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203900568] [2020-09-11 12:03:26,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:26,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:26,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:26,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:26,411 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-09-11 12:03:26,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:26,769 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-09-11 12:03:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:03:26,770 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:26,771 INFO L225 Difference]: With dead ends: 197 [2020-09-11 12:03:26,771 INFO L226 Difference]: Without dead ends: 195 [2020-09-11 12:03:26,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-11 12:03:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-09-11 12:03:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:03:26,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-09-11 12:03:26,775 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-09-11 12:03:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:26,775 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-09-11 12:03:26,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:26,776 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-09-11 12:03:26,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:26,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:26,776 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:26,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-11 12:03:26,977 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:26,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:26,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-09-11 12:03:26,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:26,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344219613] [2020-09-11 12:03:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:27,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344219613] [2020-09-11 12:03:27,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721033188] [2020-09-11 12:03:27,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:27,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:27,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:27,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:27,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:27,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:27,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:27,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877277845] [2020-09-11 12:03:27,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:27,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:27,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:27,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:27,334 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-09-11 12:03:27,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:27,888 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-09-11 12:03:27,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:03:27,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:27,890 INFO L225 Difference]: With dead ends: 214 [2020-09-11 12:03:27,890 INFO L226 Difference]: Without dead ends: 212 [2020-09-11 12:03:27,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:03:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-11 12:03:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-09-11 12:03:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:03:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-09-11 12:03:27,894 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-09-11 12:03:27,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:27,894 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-09-11 12:03:27,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-09-11 12:03:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:27,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:27,895 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:28,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-11 12:03:28,103 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-09-11 12:03:28,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:28,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894472536] [2020-09-11 12:03:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:28,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894472536] [2020-09-11 12:03:28,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291115819] [2020-09-11 12:03:28,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:28,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:03:28,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:28,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:28,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:28,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:28,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:28,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894249157] [2020-09-11 12:03:28,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:28,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:28,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:28,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:28,419 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-09-11 12:03:28,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:28,909 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-09-11 12:03:28,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:03:28,910 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:28,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:28,911 INFO L225 Difference]: With dead ends: 217 [2020-09-11 12:03:28,911 INFO L226 Difference]: Without dead ends: 215 [2020-09-11 12:03:28,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:03:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-11 12:03:28,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-09-11 12:03:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:28,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-11 12:03:28,916 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-11 12:03:28,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:28,916 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-11 12:03:28,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-11 12:03:28,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:28,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:28,917 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:29,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:29,128 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:29,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:29,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-09-11 12:03:29,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:29,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200229372] [2020-09-11 12:03:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:29,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200229372] [2020-09-11 12:03:29,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985922333] [2020-09-11 12:03:29,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:29,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:29,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:29,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:29,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:29,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537841650] [2020-09-11 12:03:29,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:29,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:29,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:29,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:29,448 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-11 12:03:29,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:29,942 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-09-11 12:03:29,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:03:29,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:29,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:29,944 INFO L225 Difference]: With dead ends: 211 [2020-09-11 12:03:29,944 INFO L226 Difference]: Without dead ends: 209 [2020-09-11 12:03:29,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:03:29,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-11 12:03:29,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-09-11 12:03:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 12:03:29,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 12:03:29,948 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 12:03:29,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:29,949 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 12:03:29,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:29,949 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 12:03:29,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:29,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:29,950 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:30,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:30,150 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:30,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:30,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-09-11 12:03:30,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:30,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901167211] [2020-09-11 12:03:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:30,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901167211] [2020-09-11 12:03:30,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725159568] [2020-09-11 12:03:30,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:30,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:30,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:30,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:30,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:30,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:30,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:30,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:30,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074839150] [2020-09-11 12:03:30,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:30,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:30,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:30,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:30,454 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 12:03:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:31,043 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-09-11 12:03:31,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:03:31,044 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:31,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:31,045 INFO L225 Difference]: With dead ends: 211 [2020-09-11 12:03:31,045 INFO L226 Difference]: Without dead ends: 206 [2020-09-11 12:03:31,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-09-11 12:03:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-11 12:03:31,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-09-11 12:03:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 12:03:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 12:03:31,049 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 12:03:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:31,049 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 12:03:31,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:31,049 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 12:03:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:31,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:31,050 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:31,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-11 12:03:31,251 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:31,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-09-11 12:03:31,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:31,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994839842] [2020-09-11 12:03:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:31,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994839842] [2020-09-11 12:03:31,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606848641] [2020-09-11 12:03:31,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:31,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:03:31,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:31,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:31,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:31,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:31,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:31,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:31,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051158279] [2020-09-11 12:03:31,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:31,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:31,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:31,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:31,583 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 12:03:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:32,317 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-09-11 12:03:32,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:03:32,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:32,319 INFO L225 Difference]: With dead ends: 227 [2020-09-11 12:03:32,319 INFO L226 Difference]: Without dead ends: 222 [2020-09-11 12:03:32,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:03:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-11 12:03:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-09-11 12:03:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-11 12:03:32,322 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-11 12:03:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:32,322 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-11 12:03:32,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-11 12:03:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:32,323 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:32,323 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:32,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-09-11 12:03:32,526 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:32,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:32,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-09-11 12:03:32,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:32,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115847429] [2020-09-11 12:03:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:32,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115847429] [2020-09-11 12:03:32,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128692244] [2020-09-11 12:03:32,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:32,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:03:32,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:32,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:32,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:32,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:32,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:32,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204921948] [2020-09-11 12:03:32,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:32,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:32,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:32,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:32,841 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-11 12:03:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:33,420 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-09-11 12:03:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:03:33,421 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:33,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:33,422 INFO L225 Difference]: With dead ends: 221 [2020-09-11 12:03:33,422 INFO L226 Difference]: Without dead ends: 219 [2020-09-11 12:03:33,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:03:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-11 12:03:33,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-09-11 12:03:33,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 12:03:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 12:03:33,426 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 12:03:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:33,426 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 12:03:33,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:33,427 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 12:03:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:33,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:33,427 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:33,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:33,631 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:33,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:33,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-09-11 12:03:33,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:33,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574138202] [2020-09-11 12:03:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:33,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574138202] [2020-09-11 12:03:33,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073461593] [2020-09-11 12:03:33,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:33,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:03:33,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:33,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:33,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:33,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:33,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:33,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:33,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759478821] [2020-09-11 12:03:33,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:33,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:33,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:33,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:33,924 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 12:03:34,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:34,619 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-09-11 12:03:34,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:03:34,620 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:34,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:34,621 INFO L225 Difference]: With dead ends: 240 [2020-09-11 12:03:34,621 INFO L226 Difference]: Without dead ends: 232 [2020-09-11 12:03:34,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:03:34,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-11 12:03:34,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-09-11 12:03:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-11 12:03:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-09-11 12:03:34,624 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-09-11 12:03:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:34,625 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-09-11 12:03:34,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-09-11 12:03:34,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:34,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:34,625 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:34,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-11 12:03:34,826 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:34,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:34,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-09-11 12:03:34,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:34,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046137411] [2020-09-11 12:03:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:34,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046137411] [2020-09-11 12:03:34,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928574943] [2020-09-11 12:03:34,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:35,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:03:35,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:35,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:35,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:35,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:35,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:35,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:35,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321780592] [2020-09-11 12:03:35,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:35,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:35,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:35,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:35,157 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-09-11 12:03:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:35,942 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-09-11 12:03:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:03:35,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:35,944 INFO L225 Difference]: With dead ends: 238 [2020-09-11 12:03:35,944 INFO L226 Difference]: Without dead ends: 230 [2020-09-11 12:03:35,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:03:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-11 12:03:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-09-11 12:03:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:03:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-11 12:03:35,948 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-11 12:03:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:35,948 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-11 12:03:35,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-11 12:03:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:35,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:35,949 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:36,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:36,157 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:36,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:36,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-09-11 12:03:36,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:36,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044073759] [2020-09-11 12:03:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:36,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044073759] [2020-09-11 12:03:36,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946225195] [2020-09-11 12:03:36,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:36,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:36,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:36,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:36,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:36,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507576944] [2020-09-11 12:03:36,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:36,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:36,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:36,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:36,472 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-11 12:03:36,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:36,783 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-09-11 12:03:36,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:36,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:36,785 INFO L225 Difference]: With dead ends: 195 [2020-09-11 12:03:36,785 INFO L226 Difference]: Without dead ends: 193 [2020-09-11 12:03:36,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-11 12:03:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-09-11 12:03:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:03:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-11 12:03:36,789 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-11 12:03:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:36,789 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-11 12:03:36,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-11 12:03:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:36,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:36,790 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:36,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-09-11 12:03:36,990 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-09-11 12:03:36,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:36,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638262008] [2020-09-11 12:03:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:37,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638262008] [2020-09-11 12:03:37,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007884597] [2020-09-11 12:03:37,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:37,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:37,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:37,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:37,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:37,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:37,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:37,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247617786] [2020-09-11 12:03:37,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:37,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:37,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:37,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:37,318 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-11 12:03:37,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:37,918 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-09-11 12:03:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:03:37,919 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:37,920 INFO L225 Difference]: With dead ends: 206 [2020-09-11 12:03:37,920 INFO L226 Difference]: Without dead ends: 204 [2020-09-11 12:03:37,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:03:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-11 12:03:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-09-11 12:03:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-09-11 12:03:37,924 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-09-11 12:03:37,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:37,924 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-09-11 12:03:37,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:37,924 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-09-11 12:03:37,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:37,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:37,925 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:38,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:38,126 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:38,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-09-11 12:03:38,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:38,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188100270] [2020-09-11 12:03:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:38,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188100270] [2020-09-11 12:03:38,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774159138] [2020-09-11 12:03:38,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:38,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:03:38,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:38,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:38,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:38,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:40,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:40,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-11 12:03:40,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355211894] [2020-09-11 12:03:40,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:03:40,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:40,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:03:40,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-09-11 12:03:40,512 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-09-11 12:03:43,018 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 25 [2020-09-11 12:04:05,918 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-09-11 12:04:35,097 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-09-11 12:04:56,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:56,382 INFO L93 Difference]: Finished difference Result 252 states and 593 transitions. [2020-09-11 12:04:56,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:04:56,383 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-09-11 12:04:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:56,385 INFO L225 Difference]: With dead ends: 252 [2020-09-11 12:04:56,385 INFO L226 Difference]: Without dead ends: 247 [2020-09-11 12:04:56,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-09-11 12:04:56,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-11 12:04:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2020-09-11 12:04:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:04:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-09-11 12:04:56,389 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-09-11 12:04:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:56,390 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-09-11 12:04:56,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:04:56,390 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-09-11 12:04:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:56,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:56,390 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:56,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-11 12:04:56,601 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:56,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-09-11 12:04:56,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:56,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079989211] [2020-09-11 12:04:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:56,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079989211] [2020-09-11 12:04:56,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140788695] [2020-09-11 12:04:56,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:56,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:04:56,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:04:56,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:56,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:56,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:56,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:56,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314700597] [2020-09-11 12:04:56,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:56,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:56,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:56,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:56,929 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-09-11 12:04:57,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:57,194 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-11 12:04:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:04:57,195 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:57,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:57,195 INFO L225 Difference]: With dead ends: 194 [2020-09-11 12:04:57,196 INFO L226 Difference]: Without dead ends: 192 [2020-09-11 12:04:57,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:04:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-11 12:04:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-09-11 12:04:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:04:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-09-11 12:04:57,199 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-09-11 12:04:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:57,199 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-09-11 12:04:57,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-09-11 12:04:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:57,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:57,200 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:57,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:57,401 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-09-11 12:04:57,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:57,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26115111] [2020-09-11 12:04:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:57,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26115111] [2020-09-11 12:04:57,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101334081] [2020-09-11 12:04:57,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:57,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:04:57,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:04:57,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:57,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:57,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:57,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:57,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037536839] [2020-09-11 12:04:57,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:57,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:57,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:57,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:57,753 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-09-11 12:04:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:58,126 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-09-11 12:04:58,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:04:58,127 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:58,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:58,127 INFO L225 Difference]: With dead ends: 205 [2020-09-11 12:04:58,128 INFO L226 Difference]: Without dead ends: 203 [2020-09-11 12:04:58,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:04:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-11 12:04:58,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-09-11 12:04:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:04:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-09-11 12:04:58,132 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-09-11 12:04:58,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:58,132 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-09-11 12:04:58,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-09-11 12:04:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:58,133 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:58,133 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:58,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:58,335 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:58,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:58,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-09-11 12:04:58,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:58,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962528436] [2020-09-11 12:04:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:58,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962528436] [2020-09-11 12:04:58,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82819788] [2020-09-11 12:04:58,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:58,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:04:58,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:04:58,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:58,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:58,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:58,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:58,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097327066] [2020-09-11 12:04:58,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:58,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:58,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:58,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:58,637 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-09-11 12:04:58,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:58,973 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-11 12:04:58,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:04:58,974 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:58,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:58,975 INFO L225 Difference]: With dead ends: 201 [2020-09-11 12:04:58,975 INFO L226 Difference]: Without dead ends: 199 [2020-09-11 12:04:58,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:04:58,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-11 12:04:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-09-11 12:04:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 12:04:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-09-11 12:04:58,978 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-09-11 12:04:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:58,978 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-09-11 12:04:58,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-09-11 12:04:58,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:58,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:58,979 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:59,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:59,179 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:59,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:59,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-09-11 12:04:59,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:59,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978247437] [2020-09-11 12:04:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:59,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978247437] [2020-09-11 12:04:59,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488767697] [2020-09-11 12:04:59,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:59,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:59,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:59,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:59,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197603844] [2020-09-11 12:04:59,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:59,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:59,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:59,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:59,516 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-09-11 12:04:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:59,788 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-11 12:04:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:04:59,789 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:59,790 INFO L225 Difference]: With dead ends: 194 [2020-09-11 12:04:59,790 INFO L226 Difference]: Without dead ends: 192 [2020-09-11 12:04:59,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:04:59,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-11 12:04:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-09-11 12:04:59,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:04:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-09-11 12:04:59,793 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-09-11 12:04:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:59,793 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-09-11 12:04:59,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-09-11 12:04:59,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:59,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:59,794 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:00,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-11 12:05:00,001 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:00,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-09-11 12:05:00,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:00,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770729631] [2020-09-11 12:05:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:00,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770729631] [2020-09-11 12:05:00,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689714139] [2020-09-11 12:05:00,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:00,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:00,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:00,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:00,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:00,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:00,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:00,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101910941] [2020-09-11 12:05:00,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:00,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:00,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:00,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:00,342 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-09-11 12:05:00,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:00,763 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-09-11 12:05:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:05:00,764 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:00,765 INFO L225 Difference]: With dead ends: 209 [2020-09-11 12:05:00,765 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 12:05:00,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 12:05:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-09-11 12:05:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:05:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-09-11 12:05:00,768 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-09-11 12:05:00,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:00,769 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-09-11 12:05:00,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-09-11 12:05:00,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:00,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:00,770 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:00,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:00,980 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:00,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:00,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-09-11 12:05:00,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:00,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827628311] [2020-09-11 12:05:00,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:01,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827628311] [2020-09-11 12:05:01,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62026008] [2020-09-11 12:05:01,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:01,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:05:01,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:01,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:01,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:01,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:01,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:01,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114487386] [2020-09-11 12:05:01,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:01,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:01,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:01,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:01,312 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-09-11 12:05:01,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:01,722 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-09-11 12:05:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:05:01,723 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:01,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:01,724 INFO L225 Difference]: With dead ends: 202 [2020-09-11 12:05:01,724 INFO L226 Difference]: Without dead ends: 200 [2020-09-11 12:05:01,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:01,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-11 12:05:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-09-11 12:05:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:05:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-11 12:05:01,728 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-11 12:05:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:01,728 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-11 12:05:01,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-11 12:05:01,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:01,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:01,729 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:01,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-11 12:05:01,930 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:01,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-09-11 12:05:01,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:01,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144327508] [2020-09-11 12:05:01,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:02,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144327508] [2020-09-11 12:05:02,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190269063] [2020-09-11 12:05:02,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:02,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:02,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:02,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:02,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:02,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:02,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:02,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938837401] [2020-09-11 12:05:02,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:02,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:02,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:02,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:02,262 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-09-11 12:05:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:02,659 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-11 12:05:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:05:02,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:02,660 INFO L225 Difference]: With dead ends: 201 [2020-09-11 12:05:02,661 INFO L226 Difference]: Without dead ends: 199 [2020-09-11 12:05:02,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:02,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-11 12:05:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-09-11 12:05:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:05:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-09-11 12:05:02,664 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-09-11 12:05:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:02,664 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-09-11 12:05:02,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-09-11 12:05:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:02,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:02,665 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:02,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-11 12:05:02,866 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:02,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-09-11 12:05:02,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:02,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557384180] [2020-09-11 12:05:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:02,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557384180] [2020-09-11 12:05:02,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421309663] [2020-09-11 12:05:02,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:03,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:03,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:03,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:03,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:03,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:03,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:03,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795977839] [2020-09-11 12:05:03,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:03,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:03,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:03,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:03,203 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-09-11 12:05:03,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:03,746 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-09-11 12:05:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:05:03,747 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:03,748 INFO L225 Difference]: With dead ends: 215 [2020-09-11 12:05:03,748 INFO L226 Difference]: Without dead ends: 213 [2020-09-11 12:05:03,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:05:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-11 12:05:03,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-09-11 12:05:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:05:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-11 12:05:03,752 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-11 12:05:03,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:03,752 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-11 12:05:03,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:03,753 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-11 12:05:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:03,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:03,753 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:03,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:03,956 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:03,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-09-11 12:05:03,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:03,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824963616] [2020-09-11 12:05:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:04,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824963616] [2020-09-11 12:05:04,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064130838] [2020-09-11 12:05:04,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:04,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:04,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:04,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:04,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:04,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:04,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:04,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034325790] [2020-09-11 12:05:04,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:04,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:04,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:04,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:04,283 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-11 12:05:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:04,757 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-09-11 12:05:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:05:04,758 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:04,759 INFO L225 Difference]: With dead ends: 196 [2020-09-11 12:05:04,759 INFO L226 Difference]: Without dead ends: 194 [2020-09-11 12:05:04,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:05:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-11 12:05:04,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-09-11 12:05:04,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:05:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 12:05:04,764 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 12:05:04,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:04,764 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 12:05:04,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:04,764 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 12:05:04,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:04,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:04,765 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:04,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:04,966 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:04,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:04,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-09-11 12:05:04,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:04,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189362817] [2020-09-11 12:05:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:05,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189362817] [2020-09-11 12:05:05,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583929616] [2020-09-11 12:05:05,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:05,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:05,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:05,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:05,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:05,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:05,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876739492] [2020-09-11 12:05:05,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:05,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:05,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:05,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:05,263 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 12:05:05,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:05,648 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-09-11 12:05:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:05:05,649 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:05,650 INFO L225 Difference]: With dead ends: 191 [2020-09-11 12:05:05,650 INFO L226 Difference]: Without dead ends: 186 [2020-09-11 12:05:05,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-11 12:05:05,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-09-11 12:05:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:05:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 12:05:05,655 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 12:05:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:05,655 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 12:05:05,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 12:05:05,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:05,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:05,656 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:05,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-11 12:05:05,858 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:05,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:05,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-09-11 12:05:05,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:05,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941297572] [2020-09-11 12:05:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:05,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941297572] [2020-09-11 12:05:05,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539552518] [2020-09-11 12:05:05,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:06,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:06,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:06,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:06,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:06,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:05:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:06,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:06,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:06,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320145873] [2020-09-11 12:05:06,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:06,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:06,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:06,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:06,207 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 12:05:06,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:06,880 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-09-11 12:05:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:05:06,881 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:06,882 INFO L225 Difference]: With dead ends: 232 [2020-09-11 12:05:06,882 INFO L226 Difference]: Without dead ends: 227 [2020-09-11 12:05:06,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:05:06,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-11 12:05:06,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-09-11 12:05:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:05:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-11 12:05:06,886 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-11 12:05:06,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:06,886 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-11 12:05:06,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-11 12:05:06,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:06,887 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:06,887 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:07,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:07,088 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:07,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:07,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-09-11 12:05:07,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:07,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558887073] [2020-09-11 12:05:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:07,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558887073] [2020-09-11 12:05:07,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213606233] [2020-09-11 12:05:07,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:07,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:05:07,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:07,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:07,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:07,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:07,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:07,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095356123] [2020-09-11 12:05:07,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:07,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:07,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:07,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:07,424 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-11 12:05:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:08,091 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-09-11 12:05:08,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:05:08,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:08,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:08,093 INFO L225 Difference]: With dead ends: 222 [2020-09-11 12:05:08,093 INFO L226 Difference]: Without dead ends: 220 [2020-09-11 12:05:08,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:05:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-11 12:05:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-09-11 12:05:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:05:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 12:05:08,097 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 12:05:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:08,098 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 12:05:08,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 12:05:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:08,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:08,098 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:08,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:08,299 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:08,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:08,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-09-11 12:05:08,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:08,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077401231] [2020-09-11 12:05:08,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:08,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077401231] [2020-09-11 12:05:08,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073432281] [2020-09-11 12:05:08,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:08,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:08,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:08,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:08,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:08,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:08,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:08,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:08,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280659074] [2020-09-11 12:05:08,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:08,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:08,654 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 12:05:09,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:09,574 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-09-11 12:05:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:05:09,575 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:09,576 INFO L225 Difference]: With dead ends: 254 [2020-09-11 12:05:09,576 INFO L226 Difference]: Without dead ends: 246 [2020-09-11 12:05:09,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:05:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-09-11 12:05:09,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-09-11 12:05:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-11 12:05:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-09-11 12:05:09,581 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-09-11 12:05:09,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:09,581 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-09-11 12:05:09,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:09,581 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-09-11 12:05:09,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:09,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:09,582 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:09,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:09,792 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:09,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:09,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-09-11 12:05:09,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:09,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793328883] [2020-09-11 12:05:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:09,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793328883] [2020-09-11 12:05:09,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090957089] [2020-09-11 12:05:09,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:09,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:09,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:09,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:09,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:10,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:05:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:10,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:10,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:10,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460326257] [2020-09-11 12:05:10,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:10,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:10,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:10,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:10,121 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-09-11 12:05:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:11,054 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-09-11 12:05:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:05:11,055 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:11,056 INFO L225 Difference]: With dead ends: 246 [2020-09-11 12:05:11,056 INFO L226 Difference]: Without dead ends: 238 [2020-09-11 12:05:11,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 12:05:11,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-11 12:05:11,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-09-11 12:05:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:05:11,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-09-11 12:05:11,060 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-09-11 12:05:11,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:11,061 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-09-11 12:05:11,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-09-11 12:05:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:11,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:11,061 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:11,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-09-11 12:05:11,272 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:11,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:11,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-09-11 12:05:11,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:11,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002373817] [2020-09-11 12:05:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:11,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002373817] [2020-09-11 12:05:11,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552041325] [2020-09-11 12:05:11,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:11,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:11,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:11,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:11,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:11,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:11,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:11,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780890187] [2020-09-11 12:05:11,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:11,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:11,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:11,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:11,599 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-09-11 12:05:12,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:12,078 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-09-11 12:05:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:05:12,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:12,081 INFO L225 Difference]: With dead ends: 208 [2020-09-11 12:05:12,081 INFO L226 Difference]: Without dead ends: 206 [2020-09-11 12:05:12,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:05:12,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-11 12:05:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-09-11 12:05:12,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 12:05:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-09-11 12:05:12,085 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-09-11 12:05:12,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:12,085 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-09-11 12:05:12,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:12,085 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-09-11 12:05:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:12,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:12,086 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:12,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-11 12:05:12,293 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:12,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:12,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-09-11 12:05:12,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:12,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057605846] [2020-09-11 12:05:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:12,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057605846] [2020-09-11 12:05:12,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856002173] [2020-09-11 12:05:12,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:12,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:12,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:12,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:12,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530681946] [2020-09-11 12:05:12,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:12,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:12,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:12,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:12,604 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-09-11 12:05:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:13,234 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-09-11 12:05:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:05:13,235 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:13,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:13,236 INFO L225 Difference]: With dead ends: 215 [2020-09-11 12:05:13,236 INFO L226 Difference]: Without dead ends: 213 [2020-09-11 12:05:13,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-09-11 12:05:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-11 12:05:13,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-09-11 12:05:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 12:05:13,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-11 12:05:13,240 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-11 12:05:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:13,241 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-11 12:05:13,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-11 12:05:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:13,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:13,241 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:13,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-11 12:05:13,442 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:13,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-09-11 12:05:13,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:13,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956464395] [2020-09-11 12:05:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:13,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956464395] [2020-09-11 12:05:13,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551220071] [2020-09-11 12:05:13,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:13,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:13,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:13,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:13,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:13,734 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:13,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:13,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:13,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125201984] [2020-09-11 12:05:13,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:13,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:13,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:13,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:13,747 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-11 12:05:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:14,445 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-09-11 12:05:14,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:05:14,446 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:14,447 INFO L225 Difference]: With dead ends: 236 [2020-09-11 12:05:14,447 INFO L226 Difference]: Without dead ends: 228 [2020-09-11 12:05:14,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:05:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-11 12:05:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-09-11 12:05:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 12:05:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-11 12:05:14,450 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-11 12:05:14,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:14,450 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-11 12:05:14,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-11 12:05:14,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:14,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:14,451 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:14,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-11 12:05:14,654 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:14,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:14,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-09-11 12:05:14,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:14,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21964528] [2020-09-11 12:05:14,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:14,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21964528] [2020-09-11 12:05:14,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882554215] [2020-09-11 12:05:14,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:14,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:05:14,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:14,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:14,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:14,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:05:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:14,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:14,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:14,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679316215] [2020-09-11 12:05:14,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:14,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:14,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:14,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:14,961 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-11 12:05:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:15,734 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-09-11 12:05:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:05:15,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:15,736 INFO L225 Difference]: With dead ends: 241 [2020-09-11 12:05:15,736 INFO L226 Difference]: Without dead ends: 233 [2020-09-11 12:05:15,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:05:15,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-11 12:05:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-09-11 12:05:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-11 12:05:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-09-11 12:05:15,740 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-09-11 12:05:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:15,740 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-09-11 12:05:15,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-09-11 12:05:15,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:15,740 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:15,740 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:15,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-11 12:05:15,941 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:15,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:15,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-09-11 12:05:15,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:15,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781043121] [2020-09-11 12:05:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:16,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781043121] [2020-09-11 12:05:16,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189787590] [2020-09-11 12:05:16,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:16,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:16,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:16,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:16,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:16,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:16,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:16,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:16,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868986953] [2020-09-11 12:05:16,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:16,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:16,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:16,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:16,259 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-09-11 12:05:16,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:16,974 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-09-11 12:05:16,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:05:16,975 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:16,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:16,976 INFO L225 Difference]: With dead ends: 232 [2020-09-11 12:05:16,977 INFO L226 Difference]: Without dead ends: 224 [2020-09-11 12:05:16,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:05:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-11 12:05:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-09-11 12:05:16,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-11 12:05:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-09-11 12:05:16,980 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-09-11 12:05:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:16,980 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-09-11 12:05:16,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-09-11 12:05:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:16,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:16,981 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:17,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:17,182 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:17,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:17,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-09-11 12:05:17,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:17,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143467306] [2020-09-11 12:05:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:17,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143467306] [2020-09-11 12:05:17,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681284707] [2020-09-11 12:05:17,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:17,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:05:17,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:17,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:17,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:17,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:17,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:17,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-11 12:05:17,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198968473] [2020-09-11 12:05:17,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:05:17,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:17,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:05:17,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:05:17,620 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-09-11 12:05:17,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:17,930 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-09-11 12:05:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:05:17,932 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-09-11 12:05:17,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:17,933 INFO L225 Difference]: With dead ends: 185 [2020-09-11 12:05:17,933 INFO L226 Difference]: Without dead ends: 180 [2020-09-11 12:05:17,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-11 12:05:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-09-11 12:05:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:05:17,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-11 12:05:17,938 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-11 12:05:17,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:17,938 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-11 12:05:17,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:05:17,939 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-11 12:05:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:17,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:17,940 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:18,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-11 12:05:18,141 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:18,141 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-09-11 12:05:18,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:18,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724083261] [2020-09-11 12:05:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:18,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724083261] [2020-09-11 12:05:18,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65950313] [2020-09-11 12:05:18,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:18,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:05:18,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:18,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:18,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:18,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:18,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:18,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095144070] [2020-09-11 12:05:18,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:18,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:18,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:18,610 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-09-11 12:05:18,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:18,678 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-09-11 12:05:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:05:18,679 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:18,680 INFO L225 Difference]: With dead ends: 180 [2020-09-11 12:05:18,680 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 12:05:18,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 12:05:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-09-11 12:05:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-11 12:05:18,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-11 12:05:18,683 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-11 12:05:18,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:18,684 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-11 12:05:18,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:18,684 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-11 12:05:18,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:18,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:18,684 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:18,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-11 12:05:18,885 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:18,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:18,886 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-09-11 12:05:18,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:18,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549701358] [2020-09-11 12:05:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:19,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549701358] [2020-09-11 12:05:19,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233703285] [2020-09-11 12:05:19,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:19,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:19,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:19,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:19,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:19,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:19,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:19,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428456149] [2020-09-11 12:05:19,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:19,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:19,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:19,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:19,347 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-11 12:05:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:19,458 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-09-11 12:05:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:05:19,459 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:19,460 INFO L225 Difference]: With dead ends: 197 [2020-09-11 12:05:19,460 INFO L226 Difference]: Without dead ends: 194 [2020-09-11 12:05:19,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:05:19,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-11 12:05:19,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-09-11 12:05:19,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-11 12:05:19,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-11 12:05:19,464 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-11 12:05:19,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:19,464 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-11 12:05:19,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:19,464 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-11 12:05:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:19,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:19,465 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:19,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:19,673 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:19,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:19,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-09-11 12:05:19,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:19,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48592776] [2020-09-11 12:05:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:19,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48592776] [2020-09-11 12:05:19,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472616241] [2020-09-11 12:05:19,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:19,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:05:19,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:19,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:19,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:20,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:20,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:20,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97886877] [2020-09-11 12:05:20,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:20,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:20,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:20,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:20,105 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-11 12:05:20,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:20,231 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-09-11 12:05:20,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:05:20,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:20,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:20,233 INFO L225 Difference]: With dead ends: 196 [2020-09-11 12:05:20,234 INFO L226 Difference]: Without dead ends: 193 [2020-09-11 12:05:20,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:05:20,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-11 12:05:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-09-11 12:05:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-11 12:05:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-09-11 12:05:20,238 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-09-11 12:05:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:20,238 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-09-11 12:05:20,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-09-11 12:05:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:20,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:20,239 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:20,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:20,439 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:20,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-09-11 12:05:20,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:20,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849982770] [2020-09-11 12:05:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:20,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849982770] [2020-09-11 12:05:20,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094168322] [2020-09-11 12:05:20,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:20,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:05:20,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:20,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:20,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:20,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:20,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:20,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659627144] [2020-09-11 12:05:20,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:20,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:20,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:20,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:20,928 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-09-11 12:05:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:21,130 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-09-11 12:05:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:21,131 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:21,132 INFO L225 Difference]: With dead ends: 195 [2020-09-11 12:05:21,132 INFO L226 Difference]: Without dead ends: 192 [2020-09-11 12:05:21,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:05:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-11 12:05:21,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-09-11 12:05:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-11 12:05:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-09-11 12:05:21,137 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-09-11 12:05:21,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:21,150 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-09-11 12:05:21,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:21,150 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-09-11 12:05:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:21,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:21,151 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:21,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:21,363 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:21,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:21,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-09-11 12:05:21,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:21,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115713025] [2020-09-11 12:05:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:21,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115713025] [2020-09-11 12:05:21,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376939825] [2020-09-11 12:05:21,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:21,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:21,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:21,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:21,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:21,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92220003] [2020-09-11 12:05:21,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:21,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:21,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:21,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:21,851 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-09-11 12:05:22,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:22,104 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-09-11 12:05:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:05:22,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:22,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:22,106 INFO L225 Difference]: With dead ends: 194 [2020-09-11 12:05:22,107 INFO L226 Difference]: Without dead ends: 191 [2020-09-11 12:05:22,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:05:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-11 12:05:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-09-11 12:05:22,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-11 12:05:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-09-11 12:05:22,112 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-09-11 12:05:22,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:22,113 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-09-11 12:05:22,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:22,113 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-09-11 12:05:22,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:22,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:22,114 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:22,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:22,326 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:22,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:22,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-09-11 12:05:22,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:22,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370758527] [2020-09-11 12:05:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:22,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370758527] [2020-09-11 12:05:22,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615385352] [2020-09-11 12:05:22,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:22,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:22,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:22,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:22,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:22,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:22,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:22,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576324200] [2020-09-11 12:05:22,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:22,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:22,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:22,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:22,698 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-09-11 12:05:22,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:22,939 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-09-11 12:05:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:05:22,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:22,941 INFO L225 Difference]: With dead ends: 193 [2020-09-11 12:05:22,941 INFO L226 Difference]: Without dead ends: 190 [2020-09-11 12:05:22,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:05:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-11 12:05:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-09-11 12:05:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-11 12:05:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-09-11 12:05:22,944 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-09-11 12:05:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:22,944 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-09-11 12:05:22,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:22,945 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-09-11 12:05:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:22,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:22,945 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:23,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-11 12:05:23,146 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:23,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:23,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-09-11 12:05:23,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:23,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115233479] [2020-09-11 12:05:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:23,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115233479] [2020-09-11 12:05:23,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444472471] [2020-09-11 12:05:23,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:23,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:05:23,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:23,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:23,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:23,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:05:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:23,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:23,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:23,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526687295] [2020-09-11 12:05:23,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:23,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:23,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:23,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:23,531 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-09-11 12:05:23,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:23,845 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-11 12:05:23,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:05:23,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:23,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:23,847 INFO L225 Difference]: With dead ends: 202 [2020-09-11 12:05:23,848 INFO L226 Difference]: Without dead ends: 196 [2020-09-11 12:05:23,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:23,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-11 12:05:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-09-11 12:05:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-11 12:05:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-09-11 12:05:23,851 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-09-11 12:05:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:23,851 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-09-11 12:05:23,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:23,852 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-09-11 12:05:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:23,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:23,852 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:24,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-11 12:05:24,062 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:24,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:24,062 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-09-11 12:05:24,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:24,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026361864] [2020-09-11 12:05:24,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:24,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026361864] [2020-09-11 12:05:24,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687792590] [2020-09-11 12:05:24,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:24,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:24,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:24,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:24,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:24,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:24,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:24,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111753491] [2020-09-11 12:05:24,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:24,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:24,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:24,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:24,484 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-09-11 12:05:24,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:24,557 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-09-11 12:05:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:05:24,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:24,559 INFO L225 Difference]: With dead ends: 188 [2020-09-11 12:05:24,559 INFO L226 Difference]: Without dead ends: 186 [2020-09-11 12:05:24,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:24,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-11 12:05:24,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-09-11 12:05:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-11 12:05:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-09-11 12:05:24,562 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-09-11 12:05:24,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:24,562 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-09-11 12:05:24,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-09-11 12:05:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:24,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:24,563 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:24,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-11 12:05:24,764 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:24,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:24,764 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-09-11 12:05:24,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:24,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148436912] [2020-09-11 12:05:24,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:24,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148436912] [2020-09-11 12:05:24,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568879927] [2020-09-11 12:05:24,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:24,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:24,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:24,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:24,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:25,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:25,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:25,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252711774] [2020-09-11 12:05:25,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:25,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:25,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:25,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:25,196 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-09-11 12:05:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:25,471 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-09-11 12:05:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:05:25,473 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:25,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:25,473 INFO L225 Difference]: With dead ends: 199 [2020-09-11 12:05:25,473 INFO L226 Difference]: Without dead ends: 197 [2020-09-11 12:05:25,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:05:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-11 12:05:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-09-11 12:05:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-11 12:05:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-11 12:05:25,477 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-11 12:05:25,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:25,477 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-11 12:05:25,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-11 12:05:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:25,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:25,478 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:25,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-11 12:05:25,679 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:25,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:25,679 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-09-11 12:05:25,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:25,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790805562] [2020-09-11 12:05:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:25,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790805562] [2020-09-11 12:05:25,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263266154] [2020-09-11 12:05:25,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:25,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:25,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:26,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:26,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:26,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943779352] [2020-09-11 12:05:26,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:26,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:26,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:26,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:26,172 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-11 12:05:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:26,520 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-11 12:05:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:05:26,521 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:26,522 INFO L225 Difference]: With dead ends: 210 [2020-09-11 12:05:26,522 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 12:05:26,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:05:26,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 12:05:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-09-11 12:05:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-11 12:05:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-09-11 12:05:26,526 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-09-11 12:05:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:26,527 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-09-11 12:05:26,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-09-11 12:05:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:26,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:26,527 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:26,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-11 12:05:26,728 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:26,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:26,728 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-09-11 12:05:26,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:26,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970959110] [2020-09-11 12:05:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:26,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970959110] [2020-09-11 12:05:26,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918204031] [2020-09-11 12:05:26,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:26,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:26,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:26,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:27,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:27,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:27,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818540943] [2020-09-11 12:05:27,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:27,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:27,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:27,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:27,209 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-09-11 12:05:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:27,596 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-11 12:05:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:27,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:27,598 INFO L225 Difference]: With dead ends: 210 [2020-09-11 12:05:27,598 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 12:05:27,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 12:05:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-09-11 12:05:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-11 12:05:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-11 12:05:27,602 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-11 12:05:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:27,602 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-11 12:05:27,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:27,602 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-11 12:05:27,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:27,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:27,602 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:27,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-09-11 12:05:27,803 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:27,804 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-09-11 12:05:27,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:27,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292003534] [2020-09-11 12:05:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:27,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292003534] [2020-09-11 12:05:27,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682383227] [2020-09-11 12:05:27,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:28,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:05:28,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:28,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:31,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:31,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:31,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902260402] [2020-09-11 12:05:31,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:31,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:31,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:31,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-09-11 12:05:31,909 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-11 12:05:36,151 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-11 12:05:36,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:36,439 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-11 12:05:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:05:36,440 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:36,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:36,441 INFO L225 Difference]: With dead ends: 218 [2020-09-11 12:05:36,441 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 12:05:36,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-09-11 12:05:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 12:05:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-11 12:05:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 12:05:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 12:05:36,446 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 12:05:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:36,446 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 12:05:36,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 12:05:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:36,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:36,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:36,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:36,647 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:36,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:36,648 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-09-11 12:05:36,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:36,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110286863] [2020-09-11 12:05:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:36,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110286863] [2020-09-11 12:05:36,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871636900] [2020-09-11 12:05:36,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:36,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:36,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:36,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:36,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:37,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:37,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:37,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473454250] [2020-09-11 12:05:37,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:37,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:37,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:37,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:37,131 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 12:05:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:37,554 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-09-11 12:05:37,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:05:37,555 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:37,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:37,556 INFO L225 Difference]: With dead ends: 212 [2020-09-11 12:05:37,556 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 12:05:37,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 12:05:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-09-11 12:05:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-11 12:05:37,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-09-11 12:05:37,560 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-09-11 12:05:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:37,560 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-09-11 12:05:37,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-09-11 12:05:37,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:37,560 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:37,561 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:37,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:37,762 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:37,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:37,762 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-09-11 12:05:37,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:37,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318996049] [2020-09-11 12:05:37,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:37,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318996049] [2020-09-11 12:05:37,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651735304] [2020-09-11 12:05:37,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:37,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:37,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:37,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:37,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:38,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:38,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:38,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488393339] [2020-09-11 12:05:38,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:38,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:38,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:38,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:38,173 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-09-11 12:05:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:38,585 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-11 12:05:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:05:38,586 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:38,587 INFO L225 Difference]: With dead ends: 212 [2020-09-11 12:05:38,587 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 12:05:38,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:05:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 12:05:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-09-11 12:05:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 12:05:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 12:05:38,591 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 12:05:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:38,591 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 12:05:38,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 12:05:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:38,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:38,591 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:38,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:38,792 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:38,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:38,793 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-09-11 12:05:38,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:38,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057516520] [2020-09-11 12:05:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:38,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057516520] [2020-09-11 12:05:38,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426618169] [2020-09-11 12:05:38,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:39,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:05:39,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:39,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:39,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:39,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:39,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:39,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423903655] [2020-09-11 12:05:39,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:39,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:39,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:39,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:39,217 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 12:05:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:39,655 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-09-11 12:05:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:39,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:39,657 INFO L225 Difference]: With dead ends: 224 [2020-09-11 12:05:39,657 INFO L226 Difference]: Without dead ends: 222 [2020-09-11 12:05:39,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:05:39,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-11 12:05:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-09-11 12:05:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 12:05:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 12:05:39,661 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 12:05:39,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:39,661 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 12:05:39,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 12:05:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:39,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:39,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:39,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:39,864 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:39,865 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-09-11 12:05:39,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:39,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577618193] [2020-09-11 12:05:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:40,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577618193] [2020-09-11 12:05:40,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360733654] [2020-09-11 12:05:40,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:40,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:40,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:40,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:40,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:40,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712342075] [2020-09-11 12:05:40,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:40,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:40,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:40,279 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 12:05:40,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:40,663 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-09-11 12:05:40,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:40,664 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:40,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:40,665 INFO L225 Difference]: With dead ends: 218 [2020-09-11 12:05:40,665 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 12:05:40,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 12:05:40,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-11 12:05:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 12:05:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 12:05:40,668 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 12:05:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:40,668 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 12:05:40,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 12:05:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:40,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:40,669 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:40,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:40,870 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:40,870 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-09-11 12:05:40,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:40,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404358277] [2020-09-11 12:05:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:41,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404358277] [2020-09-11 12:05:41,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464318995] [2020-09-11 12:05:41,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:41,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:41,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:41,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:41,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:41,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:41,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:41,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906747909] [2020-09-11 12:05:41,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:41,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:41,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:41,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:41,267 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 12:05:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:41,600 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-09-11 12:05:41,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:41,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:41,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:41,602 INFO L225 Difference]: With dead ends: 206 [2020-09-11 12:05:41,602 INFO L226 Difference]: Without dead ends: 204 [2020-09-11 12:05:41,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-11 12:05:41,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-09-11 12:05:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-11 12:05:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-09-11 12:05:41,605 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-09-11 12:05:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:41,605 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-09-11 12:05:41,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-09-11 12:05:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:41,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:41,606 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:41,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-11 12:05:41,807 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:41,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:41,807 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-09-11 12:05:41,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:41,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294118163] [2020-09-11 12:05:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:41,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294118163] [2020-09-11 12:05:41,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290541958] [2020-09-11 12:05:41,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:42,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:05:42,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:42,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:42,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:42,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:42,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:42,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962173544] [2020-09-11 12:05:42,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:42,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:42,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:42,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:42,217 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-09-11 12:05:42,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:42,550 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-09-11 12:05:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:42,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:42,553 INFO L225 Difference]: With dead ends: 207 [2020-09-11 12:05:42,553 INFO L226 Difference]: Without dead ends: 205 [2020-09-11 12:05:42,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-11 12:05:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-09-11 12:05:42,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-11 12:05:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-09-11 12:05:42,558 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-09-11 12:05:42,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:42,558 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-09-11 12:05:42,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:42,558 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-09-11 12:05:42,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:42,559 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:42,559 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:42,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-11 12:05:42,771 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:42,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:42,771 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-09-11 12:05:42,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:42,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437043104] [2020-09-11 12:05:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:42,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437043104] [2020-09-11 12:05:42,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554176829] [2020-09-11 12:05:42,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:42,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:42,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:42,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:42,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:43,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:43,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:43,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807064641] [2020-09-11 12:05:43,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:43,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:43,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:43,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:43,201 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-09-11 12:05:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:43,556 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-09-11 12:05:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:05:43,557 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:43,558 INFO L225 Difference]: With dead ends: 217 [2020-09-11 12:05:43,558 INFO L226 Difference]: Without dead ends: 215 [2020-09-11 12:05:43,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:43,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-11 12:05:43,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-09-11 12:05:43,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-11 12:05:43,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-09-11 12:05:43,562 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-09-11 12:05:43,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:43,562 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-09-11 12:05:43,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:43,562 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-09-11 12:05:43,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:43,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:43,563 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:43,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-11 12:05:43,764 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:43,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:43,764 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-09-11 12:05:43,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:43,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550776792] [2020-09-11 12:05:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:43,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550776792] [2020-09-11 12:05:43,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928382217] [2020-09-11 12:05:43,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:43,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:43,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:43,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:44,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:44,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:44,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006319812] [2020-09-11 12:05:44,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:44,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:44,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:44,312 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-09-11 12:05:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:44,792 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-09-11 12:05:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:44,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:44,794 INFO L225 Difference]: With dead ends: 223 [2020-09-11 12:05:44,794 INFO L226 Difference]: Without dead ends: 221 [2020-09-11 12:05:44,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:44,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-11 12:05:44,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-09-11 12:05:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-11 12:05:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-09-11 12:05:44,798 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-09-11 12:05:44,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:44,798 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-09-11 12:05:44,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-09-11 12:05:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:44,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:44,799 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:44,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-11 12:05:45,000 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:45,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:45,000 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-09-11 12:05:45,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:45,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407502330] [2020-09-11 12:05:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:45,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407502330] [2020-09-11 12:05:45,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012211821] [2020-09-11 12:05:45,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:45,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:45,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:45,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:45,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:45,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:45,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:45,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969715193] [2020-09-11 12:05:45,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:45,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:45,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:45,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:45,408 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-09-11 12:05:45,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:45,798 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-09-11 12:05:45,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:45,799 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:45,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:45,800 INFO L225 Difference]: With dead ends: 225 [2020-09-11 12:05:45,800 INFO L226 Difference]: Without dead ends: 223 [2020-09-11 12:05:45,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:45,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-11 12:05:45,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-09-11 12:05:45,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-11 12:05:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-09-11 12:05:45,804 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-09-11 12:05:45,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:45,805 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-09-11 12:05:45,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:45,805 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-09-11 12:05:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:45,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:45,806 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:46,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:46,006 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:46,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:46,007 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-09-11 12:05:46,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:46,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427886139] [2020-09-11 12:05:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:46,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427886139] [2020-09-11 12:05:46,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750627971] [2020-09-11 12:05:46,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:46,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:46,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:46,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:46,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:46,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72441452] [2020-09-11 12:05:46,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:46,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:46,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:46,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:46,459 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-09-11 12:05:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:46,841 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-09-11 12:05:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:46,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:46,843 INFO L225 Difference]: With dead ends: 214 [2020-09-11 12:05:46,843 INFO L226 Difference]: Without dead ends: 212 [2020-09-11 12:05:46,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:46,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-11 12:05:46,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-09-11 12:05:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-11 12:05:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-09-11 12:05:46,847 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-09-11 12:05:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:46,847 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-09-11 12:05:46,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:46,848 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-09-11 12:05:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:46,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:46,848 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:47,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:47,058 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:47,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:47,059 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-09-11 12:05:47,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:47,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106178906] [2020-09-11 12:05:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:47,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106178906] [2020-09-11 12:05:47,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914101682] [2020-09-11 12:05:47,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:47,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:47,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:47,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:47,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:47,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:47,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:47,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381199510] [2020-09-11 12:05:47,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:47,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:47,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:47,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:47,517 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-09-11 12:05:47,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:47,791 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-09-11 12:05:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:05:47,792 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:47,792 INFO L225 Difference]: With dead ends: 203 [2020-09-11 12:05:47,793 INFO L226 Difference]: Without dead ends: 201 [2020-09-11 12:05:47,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:05:47,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-11 12:05:47,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-09-11 12:05:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-11 12:05:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-09-11 12:05:47,796 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-09-11 12:05:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:47,796 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-09-11 12:05:47,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-09-11 12:05:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:47,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:47,797 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:47,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-09-11 12:05:47,998 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-09-11 12:05:47,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:47,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906600248] [2020-09-11 12:05:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:48,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906600248] [2020-09-11 12:05:48,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676496354] [2020-09-11 12:05:48,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:48,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:05:48,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:48,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:48,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:48,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:48,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:48,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580027933] [2020-09-11 12:05:48,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:48,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:48,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:48,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:48,504 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-09-11 12:05:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:48,605 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-11 12:05:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:05:48,606 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:48,607 INFO L225 Difference]: With dead ends: 212 [2020-09-11 12:05:48,607 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 12:05:48,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:05:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 12:05:48,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-09-11 12:05:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-11 12:05:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-09-11 12:05:48,610 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-09-11 12:05:48,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:48,610 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-09-11 12:05:48,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-09-11 12:05:48,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:48,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:48,611 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:48,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:48,812 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:48,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-09-11 12:05:48,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:48,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965837237] [2020-09-11 12:05:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:49,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965837237] [2020-09-11 12:05:49,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866510251] [2020-09-11 12:05:49,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:49,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:49,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:49,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:49,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:49,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:49,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:49,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706893334] [2020-09-11 12:05:49,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:49,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:49,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:49,301 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-09-11 12:05:49,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:49,616 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-09-11 12:05:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:49,618 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:49,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:49,618 INFO L225 Difference]: With dead ends: 217 [2020-09-11 12:05:49,619 INFO L226 Difference]: Without dead ends: 215 [2020-09-11 12:05:49,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:05:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-11 12:05:49,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-09-11 12:05:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-11 12:05:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-11 12:05:49,622 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-11 12:05:49,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:49,623 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-11 12:05:49,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:49,623 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-11 12:05:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:49,623 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:49,623 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:49,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:49,824 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:49,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:49,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-09-11 12:05:49,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:49,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119482005] [2020-09-11 12:05:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:50,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119482005] [2020-09-11 12:05:50,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555507244] [2020-09-11 12:05:50,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:50,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:50,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:50,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:50,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:50,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:50,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:50,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97402381] [2020-09-11 12:05:50,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:50,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:50,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:50,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:50,993 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-11 12:05:51,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:51,401 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-11 12:05:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:51,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:51,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:51,402 INFO L225 Difference]: With dead ends: 227 [2020-09-11 12:05:51,403 INFO L226 Difference]: Without dead ends: 225 [2020-09-11 12:05:51,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-11 12:05:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-11 12:05:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-11 12:05:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-09-11 12:05:51,407 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-09-11 12:05:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:51,407 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-09-11 12:05:51,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-09-11 12:05:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:51,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:51,408 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:51,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:51,611 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:51,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:51,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-09-11 12:05:51,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:51,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989396536] [2020-09-11 12:05:51,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:51,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989396536] [2020-09-11 12:05:51,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945187495] [2020-09-11 12:05:51,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:51,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:51,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:51,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:51,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:52,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:52,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:52,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801428464] [2020-09-11 12:05:52,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:52,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:52,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:52,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:52,097 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-09-11 12:05:52,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:52,593 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-11 12:05:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:05:52,594 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:52,595 INFO L225 Difference]: With dead ends: 227 [2020-09-11 12:05:52,595 INFO L226 Difference]: Without dead ends: 225 [2020-09-11 12:05:52,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:05:52,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-11 12:05:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-09-11 12:05:52,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-11 12:05:52,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-11 12:05:52,598 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-11 12:05:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:52,599 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-11 12:05:52,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:52,599 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-11 12:05:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:52,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:52,599 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:52,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-09-11 12:05:52,803 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:52,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:52,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-09-11 12:05:52,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:52,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544877824] [2020-09-11 12:05:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:52,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544877824] [2020-09-11 12:05:52,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469778004] [2020-09-11 12:05:52,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:53,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:53,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:56,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:56,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:56,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083428582] [2020-09-11 12:05:56,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:56,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:56,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:56,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-09-11 12:05:56,598 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-11 12:06:00,875 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-11 12:06:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:01,257 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-09-11 12:06:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:01,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:01,259 INFO L225 Difference]: With dead ends: 237 [2020-09-11 12:06:01,259 INFO L226 Difference]: Without dead ends: 235 [2020-09-11 12:06:01,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-09-11 12:06:01,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-11 12:06:01,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-09-11 12:06:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:06:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 12:06:01,262 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 12:06:01,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:01,262 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 12:06:01,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 12:06:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:01,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:01,263 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:01,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-11 12:06:01,464 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:01,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:01,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-09-11 12:06:01,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:01,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202629884] [2020-09-11 12:06:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:01,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202629884] [2020-09-11 12:06:01,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483806269] [2020-09-11 12:06:01,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:01,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:01,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:01,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:01,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:01,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:01,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63778095] [2020-09-11 12:06:01,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:01,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:01,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:01,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:01,960 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-11 12:06:02,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:02,474 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-09-11 12:06:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:02,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:02,476 INFO L225 Difference]: With dead ends: 229 [2020-09-11 12:06:02,476 INFO L226 Difference]: Without dead ends: 227 [2020-09-11 12:06:02,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:06:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-11 12:06:02,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-09-11 12:06:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-11 12:06:02,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-09-11 12:06:02,480 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-09-11 12:06:02,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:02,481 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-09-11 12:06:02,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:02,481 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-09-11 12:06:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:02,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:02,482 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:02,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-11 12:06:02,683 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:02,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-09-11 12:06:02,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:02,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380959110] [2020-09-11 12:06:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:02,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380959110] [2020-09-11 12:06:02,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536952248] [2020-09-11 12:06:02,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:02,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:02,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:02,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:02,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:03,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:03,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:03,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322435471] [2020-09-11 12:06:03,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:03,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:03,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:03,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:03,113 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-09-11 12:06:03,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:03,644 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-11 12:06:03,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:06:03,645 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:03,646 INFO L225 Difference]: With dead ends: 225 [2020-09-11 12:06:03,646 INFO L226 Difference]: Without dead ends: 223 [2020-09-11 12:06:03,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-09-11 12:06:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-11 12:06:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-09-11 12:06:03,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:06:03,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 12:06:03,650 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 12:06:03,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:03,650 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 12:06:03,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:03,650 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 12:06:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:03,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:03,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:03,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-11 12:06:03,851 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:03,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:03,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-09-11 12:06:03,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:03,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189000908] [2020-09-11 12:06:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:04,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189000908] [2020-09-11 12:06:04,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95586321] [2020-09-11 12:06:04,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:04,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:04,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:04,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:04,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:04,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:04,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:04,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947111448] [2020-09-11 12:06:04,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:04,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:04,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:04,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:04,338 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-11 12:06:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:05,024 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-09-11 12:06:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:06:05,025 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:05,025 INFO L225 Difference]: With dead ends: 239 [2020-09-11 12:06:05,025 INFO L226 Difference]: Without dead ends: 237 [2020-09-11 12:06:05,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-09-11 12:06:05,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-11 12:06:05,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-11 12:06:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:06:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 12:06:05,029 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 12:06:05,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:05,029 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 12:06:05,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:05,029 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 12:06:05,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:05,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:05,030 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:05,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-11 12:06:05,240 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:05,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:05,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-09-11 12:06:05,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:05,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725231452] [2020-09-11 12:06:05,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:05,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725231452] [2020-09-11 12:06:05,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025384819] [2020-09-11 12:06:05,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:05,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:06:05,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:05,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:05,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:05,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:05,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:05,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010670761] [2020-09-11 12:06:05,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:05,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:05,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:05,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:05,667 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-11 12:06:06,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:06,136 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-09-11 12:06:06,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:06:06,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:06,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:06,137 INFO L225 Difference]: With dead ends: 234 [2020-09-11 12:06:06,138 INFO L226 Difference]: Without dead ends: 232 [2020-09-11 12:06:06,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:06:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-11 12:06:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-09-11 12:06:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:06:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 12:06:06,141 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 12:06:06,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:06,141 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 12:06:06,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 12:06:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:06,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:06,145 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:06,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-09-11 12:06:06,354 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:06,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:06,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-09-11 12:06:06,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:06,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737125596] [2020-09-11 12:06:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:06,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737125596] [2020-09-11 12:06:06,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093436740] [2020-09-11 12:06:06,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:06,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:06:06,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:06,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:06,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:06,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:06,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:06,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762005048] [2020-09-11 12:06:06,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:06,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:06,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:06,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:06,764 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-11 12:06:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:07,174 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-09-11 12:06:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:07,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:07,176 INFO L225 Difference]: With dead ends: 218 [2020-09-11 12:06:07,176 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 12:06:07,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:06:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 12:06:07,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-09-11 12:06:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-11 12:06:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-09-11 12:06:07,179 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-09-11 12:06:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:07,180 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-09-11 12:06:07,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-09-11 12:06:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:07,180 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:07,180 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:07,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:07,381 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:07,382 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-09-11 12:06:07,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:07,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008051883] [2020-09-11 12:06:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:07,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008051883] [2020-09-11 12:06:07,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893156504] [2020-09-11 12:06:07,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:07,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:07,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:07,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:07,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261516353] [2020-09-11 12:06:07,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:07,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:07,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:07,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:07,861 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-09-11 12:06:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:08,002 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-09-11 12:06:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:08,003 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:08,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:08,004 INFO L225 Difference]: With dead ends: 208 [2020-09-11 12:06:08,004 INFO L226 Difference]: Without dead ends: 206 [2020-09-11 12:06:08,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:06:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-11 12:06:08,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-09-11 12:06:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-11 12:06:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-09-11 12:06:08,013 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-09-11 12:06:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:08,013 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-09-11 12:06:08,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-09-11 12:06:08,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:08,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:08,013 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:08,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:08,214 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:08,215 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-09-11 12:06:08,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:08,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043239675] [2020-09-11 12:06:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:08,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043239675] [2020-09-11 12:06:08,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561999535] [2020-09-11 12:06:08,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:08,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:08,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:08,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:08,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:08,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:08,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:08,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949057176] [2020-09-11 12:06:08,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:08,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:08,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:08,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:08,667 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-09-11 12:06:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:09,038 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-09-11 12:06:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:06:09,039 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:09,040 INFO L225 Difference]: With dead ends: 229 [2020-09-11 12:06:09,040 INFO L226 Difference]: Without dead ends: 227 [2020-09-11 12:06:09,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:06:09,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-11 12:06:09,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-09-11 12:06:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:06:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-11 12:06:09,045 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-11 12:06:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:09,045 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-11 12:06:09,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:09,045 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-11 12:06:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:09,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:09,046 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:09,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:09,247 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:09,247 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-09-11 12:06:09,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:09,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177408646] [2020-09-11 12:06:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:09,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177408646] [2020-09-11 12:06:09,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194166640] [2020-09-11 12:06:09,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:09,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:09,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:09,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:09,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:09,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:09,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:09,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398098432] [2020-09-11 12:06:09,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:09,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:09,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:09,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:09,746 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-11 12:06:10,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:10,192 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-09-11 12:06:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:06:10,193 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:10,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:10,194 INFO L225 Difference]: With dead ends: 235 [2020-09-11 12:06:10,194 INFO L226 Difference]: Without dead ends: 233 [2020-09-11 12:06:10,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:06:10,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-11 12:06:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-09-11 12:06:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-11 12:06:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-09-11 12:06:10,198 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-09-11 12:06:10,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:10,198 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-09-11 12:06:10,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-09-11 12:06:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:10,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:10,199 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:10,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:10,399 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:10,400 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-09-11 12:06:10,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:10,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128706620] [2020-09-11 12:06:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:10,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128706620] [2020-09-11 12:06:10,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951890387] [2020-09-11 12:06:10,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:10,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:10,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:10,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:10,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:10,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:10,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:10,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545962655] [2020-09-11 12:06:10,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:10,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:10,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:10,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:10,857 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-09-11 12:06:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:11,403 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-09-11 12:06:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:11,404 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:11,405 INFO L225 Difference]: With dead ends: 233 [2020-09-11 12:06:11,405 INFO L226 Difference]: Without dead ends: 231 [2020-09-11 12:06:11,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:06:11,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-11 12:06:11,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-09-11 12:06:11,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:06:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-11 12:06:11,409 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-11 12:06:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:11,410 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-11 12:06:11,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-11 12:06:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:11,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:11,411 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:11,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:11,619 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:11,619 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-09-11 12:06:11,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:11,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792555655] [2020-09-11 12:06:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:11,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792555655] [2020-09-11 12:06:11,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113119588] [2020-09-11 12:06:11,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:11,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:11,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:11,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:11,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:16,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:16,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:16,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788093469] [2020-09-11 12:06:16,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:16,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:16,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:16,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-09-11 12:06:16,184 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-11 12:06:20,513 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-11 12:06:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:20,941 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-09-11 12:06:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:06:20,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:20,943 INFO L225 Difference]: With dead ends: 241 [2020-09-11 12:06:20,943 INFO L226 Difference]: Without dead ends: 239 [2020-09-11 12:06:20,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-09-11 12:06:20,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-11 12:06:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-09-11 12:06:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:06:20,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-09-11 12:06:20,947 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-09-11 12:06:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:20,947 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-09-11 12:06:20,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-09-11 12:06:20,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:20,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:20,948 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:21,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:21,148 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:21,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:21,149 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-09-11 12:06:21,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:21,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404141872] [2020-09-11 12:06:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:21,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404141872] [2020-09-11 12:06:21,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637479364] [2020-09-11 12:06:21,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:21,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:06:21,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:21,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:21,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:21,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:21,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:21,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120083207] [2020-09-11 12:06:21,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:21,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:21,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:21,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:21,664 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-09-11 12:06:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:22,262 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-09-11 12:06:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:06:22,263 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:22,264 INFO L225 Difference]: With dead ends: 233 [2020-09-11 12:06:22,264 INFO L226 Difference]: Without dead ends: 231 [2020-09-11 12:06:22,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:06:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-11 12:06:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-09-11 12:06:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-11 12:06:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-09-11 12:06:22,268 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-09-11 12:06:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:22,268 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-09-11 12:06:22,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:22,268 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-09-11 12:06:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:22,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:22,268 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:22,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-09-11 12:06:22,469 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:22,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:22,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-09-11 12:06:22,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:22,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451367647] [2020-09-11 12:06:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:22,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451367647] [2020-09-11 12:06:22,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953418295] [2020-09-11 12:06:22,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:22,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:22,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:22,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:22,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:22,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978072312] [2020-09-11 12:06:22,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:22,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:22,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:22,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:22,952 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-09-11 12:06:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:23,151 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-09-11 12:06:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:23,153 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:23,154 INFO L225 Difference]: With dead ends: 204 [2020-09-11 12:06:23,154 INFO L226 Difference]: Without dead ends: 202 [2020-09-11 12:06:23,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:06:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-11 12:06:23,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-09-11 12:06:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-11 12:06:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-09-11 12:06:23,164 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-09-11 12:06:23,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:23,165 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-09-11 12:06:23,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-09-11 12:06:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:23,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:23,165 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:23,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:23,376 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:23,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-09-11 12:06:23,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:23,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263086448] [2020-09-11 12:06:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:23,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263086448] [2020-09-11 12:06:23,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30384881] [2020-09-11 12:06:23,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:23,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:23,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:23,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:23,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:23,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:23,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:23,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249958966] [2020-09-11 12:06:23,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:23,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:23,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:23,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:23,829 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-09-11 12:06:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:24,260 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-09-11 12:06:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:24,261 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:24,262 INFO L225 Difference]: With dead ends: 225 [2020-09-11 12:06:24,262 INFO L226 Difference]: Without dead ends: 223 [2020-09-11 12:06:24,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:06:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-11 12:06:24,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-09-11 12:06:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-11 12:06:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-09-11 12:06:24,266 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-09-11 12:06:24,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:24,266 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-09-11 12:06:24,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:24,266 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-09-11 12:06:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:24,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:24,267 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:24,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-11 12:06:24,468 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:24,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:24,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-09-11 12:06:24,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:24,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089119371] [2020-09-11 12:06:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:24,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089119371] [2020-09-11 12:06:24,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884519153] [2020-09-11 12:06:24,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:24,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:24,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:24,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:24,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:24,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:24,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:24,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453694495] [2020-09-11 12:06:24,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:24,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:24,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:24,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:24,920 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. Received shutdown request... [2020-09-11 12:06:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:06:25,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:25,483 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 12:06:25,489 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 12:06:25,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 12:06:25 BasicIcfg [2020-09-11 12:06:25,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 12:06:25,492 INFO L168 Benchmark]: Toolchain (without parser) took 267547.27 ms. Allocated memory was 109.1 MB in the beginning and 169.9 MB in the end (delta: 60.8 MB). Free memory was 72.9 MB in the beginning and 93.0 MB in the end (delta: -20.1 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:25,492 INFO L168 Benchmark]: CDTParser took 1.49 ms. Allocated memory is still 109.1 MB. Free memory was 91.8 MB in the beginning and 91.6 MB in the end (delta: 105.2 kB). Peak memory consumption was 105.2 kB. Max. memory is 7.1 GB. [2020-09-11 12:06:25,493 INFO L168 Benchmark]: CACSL2BoogieTranslator took 795.59 ms. Allocated memory was 109.1 MB in the beginning and 167.2 MB in the end (delta: 58.2 MB). Free memory was 72.3 MB in the beginning and 134.2 MB in the end (delta: -61.9 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:25,493 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.79 ms. Allocated memory is still 167.2 MB. Free memory was 134.2 MB in the beginning and 132.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:25,493 INFO L168 Benchmark]: Boogie Preprocessor took 31.60 ms. Allocated memory is still 167.2 MB. Free memory was 132.2 MB in the beginning and 130.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:25,494 INFO L168 Benchmark]: RCFGBuilder took 481.87 ms. Allocated memory is still 167.2 MB. Free memory was 130.4 MB in the beginning and 110.2 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:25,494 INFO L168 Benchmark]: TraceAbstraction took 266149.25 ms. Allocated memory was 167.2 MB in the beginning and 169.9 MB in the end (delta: 2.6 MB). Free memory was 109.7 MB in the beginning and 93.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:25,496 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.49 ms. Allocated memory is still 109.1 MB. Free memory was 91.8 MB in the beginning and 91.6 MB in the end (delta: 105.2 kB). Peak memory consumption was 105.2 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 795.59 ms. Allocated memory was 109.1 MB in the beginning and 167.2 MB in the end (delta: 58.2 MB). Free memory was 72.3 MB in the beginning and 134.2 MB in the end (delta: -61.9 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 79.79 ms. Allocated memory is still 167.2 MB. Free memory was 134.2 MB in the beginning and 132.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.60 ms. Allocated memory is still 167.2 MB. Free memory was 132.2 MB in the beginning and 130.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 481.87 ms. Allocated memory is still 167.2 MB. Free memory was 130.4 MB in the beginning and 110.2 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 266149.25 ms. Allocated memory was 167.2 MB in the beginning and 169.9 MB in the end (delta: 2.6 MB). Free memory was 109.7 MB in the beginning and 93.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 576 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 988 CheckedPairsTotal, 47 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (162states) and FLOYD_HOARE automaton (currently 14 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 24 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 266.0s, OverallIterations: 181, TraceHistogramMax: 6, AutomataDifference: 151.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 2351 SDtfs, 16304 SDslu, 15959 SDs, 0 SdLazy, 11289 SolverSat, 4026 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 58.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4481 GetRequests, 852 SyntacticMatches, 156 SemanticMatches, 3472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17665 ImplicationChecksByTransitivity, 144.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 180 MinimizatonAttempts, 8252 StatesRemovedByMinimization, 180 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 64.6s InterpolantComputationTime, 4418 NumberOfCodeBlocks, 4418 NumberOfCodeBlocksAsserted, 550 NumberOfCheckSat, 4064 ConstructedInterpolants, 9 QuantifiedInterpolants, 423460 SizeOfPredicates, 173 NumberOfNonLiveVariables, 14992 ConjunctsInSsa, 1687 ConjunctsInUnsatCore, 354 InterpolantComputations, 8 PerfectInterpolantSequences, 0/1716 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown